2 * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
4 * Device driver for Microgate SyncLink Multiport
5 * high speed multiprotocol serial adapter.
7 * written by Paul Fulghum for Microgate Corporation
10 * Microgate and SyncLink are trademarks of Microgate Corporation
12 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
13 * This code is released under the GNU General Public License (GPL)
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
25 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
30 # define BREAKPOINT() asm(" int $3");
32 # define BREAKPOINT() { }
35 #define MAX_DEVICES 12
37 #include <linux/module.h>
38 #include <linux/errno.h>
39 #include <linux/signal.h>
40 #include <linux/sched.h>
41 #include <linux/timer.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/tty.h>
45 #include <linux/tty_flip.h>
46 #include <linux/serial.h>
47 #include <linux/major.h>
48 #include <linux/string.h>
49 #include <linux/fcntl.h>
50 #include <linux/ptrace.h>
51 #include <linux/ioport.h>
53 #include <linux/slab.h>
54 #include <linux/netdevice.h>
55 #include <linux/vmalloc.h>
56 #include <linux/init.h>
57 #include <linux/delay.h>
58 #include <linux/ioctl.h>
60 #include <asm/system.h>
64 #include <linux/bitops.h>
65 #include <asm/types.h>
66 #include <linux/termios.h>
67 #include <linux/workqueue.h>
68 #include <linux/hdlc.h>
69 #include <linux/synclink.h>
71 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
72 #define SYNCLINK_GENERIC_HDLC 1
74 #define SYNCLINK_GENERIC_HDLC 0
77 #define GET_USER(error,value,addr) error = get_user(value,addr)
78 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
79 #define PUT_USER(error,value,addr) error = put_user(value,addr)
80 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
82 #include <asm/uaccess.h>
84 static MGSL_PARAMS default_params = {
85 MGSL_MODE_HDLC, /* unsigned long mode */
86 0, /* unsigned char loopback; */
87 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
88 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
89 0, /* unsigned long clock_speed; */
90 0xff, /* unsigned char addr_filter; */
91 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
92 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
93 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
94 9600, /* unsigned long data_rate; */
95 8, /* unsigned char data_bits; */
96 1, /* unsigned char stop_bits; */
97 ASYNC_PARITY_NONE /* unsigned char parity; */
100 /* size in bytes of DMA data buffers */
101 #define SCABUFSIZE 1024
102 #define SCA_MEM_SIZE 0x40000
103 #define SCA_BASE_SIZE 512
104 #define SCA_REG_SIZE 16
105 #define SCA_MAX_PORTS 4
106 #define SCAMAXDESC 128
108 #define BUFFERLISTSIZE 4096
110 /* SCA-I style DMA buffer descriptor */
111 typedef struct _SCADESC
113 u16 next; /* lower l6 bits of next descriptor addr */
114 u16 buf_ptr; /* lower 16 bits of buffer addr */
115 u8 buf_base; /* upper 8 bits of buffer addr */
117 u16 length; /* length of buffer */
118 u8 status; /* status of buffer */
120 } SCADESC, *PSCADESC;
122 typedef struct _SCADESC_EX
124 /* device driver bookkeeping section */
125 char *virt_addr; /* virtual address of data buffer */
126 u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
127 } SCADESC_EX, *PSCADESC_EX;
129 /* The queue of BH actions to be performed */
132 #define BH_TRANSMIT 2
135 #define IO_PIN_SHUTDOWN_LIMIT 100
137 struct _input_signal_events {
149 * Device instance data structure
151 typedef struct _synclinkmp_info {
152 void *if_ptr; /* General purpose pointer (used by SPPP) */
154 struct tty_port port;
156 unsigned short close_delay;
157 unsigned short closing_wait; /* time to wait before closing */
159 struct mgsl_icount icount;
162 int x_char; /* xon/xoff character */
163 u16 read_status_mask1; /* break detection (SR1 indications) */
164 u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
165 unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
166 unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
167 unsigned char *tx_buf;
172 wait_queue_head_t status_event_wait_q;
173 wait_queue_head_t event_wait_q;
174 struct timer_list tx_timer; /* HDLC transmit timeout timer */
175 struct _synclinkmp_info *next_device; /* device list link */
176 struct timer_list status_timer; /* input signal status check timer */
178 spinlock_t lock; /* spinlock for synchronizing with ISR */
179 struct work_struct task; /* task structure for scheduling bh */
181 u32 max_frame_size; /* as set by device config */
185 bool bh_running; /* Protection from multiple */
189 int dcd_chkcount; /* check counts to prevent */
190 int cts_chkcount; /* too many IRQs if a signal */
191 int dsr_chkcount; /* is floating */
194 char *buffer_list; /* virtual address of Rx & Tx buffer lists */
195 unsigned long buffer_list_phys;
197 unsigned int rx_buf_count; /* count of total allocated Rx buffers */
198 SCADESC *rx_buf_list; /* list of receive buffer entries */
199 SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
200 unsigned int current_rx_buf;
202 unsigned int tx_buf_count; /* count of total allocated Tx buffers */
203 SCADESC *tx_buf_list; /* list of transmit buffer entries */
204 SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
205 unsigned int last_tx_buf;
207 unsigned char *tmp_rx_buf;
208 unsigned int tmp_rx_buf_count;
217 unsigned char ie0_value;
218 unsigned char ie1_value;
219 unsigned char ie2_value;
220 unsigned char ctrlreg_value;
221 unsigned char old_signals;
223 char device_name[25]; /* device instance name */
229 struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
231 unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
233 unsigned int irq_level; /* interrupt level */
234 unsigned long irq_flags;
235 bool irq_requested; /* true if IRQ requested */
237 MGSL_PARAMS params; /* communications parameters */
239 unsigned char serial_signals; /* current serial signal states */
241 bool irq_occurred; /* for diagnostics use */
242 unsigned int init_error; /* Initialization startup error */
245 unsigned char* memory_base; /* shared memory address (PCI only) */
246 u32 phys_memory_base;
247 int shared_mem_requested;
249 unsigned char* sca_base; /* HD64570 SCA Memory address */
252 bool sca_base_requested;
254 unsigned char* lcr_base; /* local config registers (PCI only) */
257 int lcr_mem_requested;
259 unsigned char* statctrl_base; /* status/control register memory */
260 u32 phys_statctrl_base;
262 bool sca_statctrl_requested;
265 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
266 char char_buf[MAX_ASYNC_BUFFER_SIZE];
267 bool drop_rts_on_tx_done;
269 struct _input_signal_events input_signal_events;
271 /* SPPP/Cisco HDLC device parts */
275 #if SYNCLINK_GENERIC_HDLC
276 struct net_device *netdev;
281 #define MGSL_MAGIC 0x5401
284 * define serial signal status change macros
286 #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
287 #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
288 #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
289 #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
291 /* Common Register macros */
310 /* MSCI Register macros */
340 /* Timer Register Macros */
350 /* DMA Controller Register macros */
381 /* combine with timer or DMA register address */
389 /* SCA Command Codes */
392 #define TXENABLE 0x02
393 #define TXDISABLE 0x03
394 #define TXCRCINIT 0x04
395 #define TXCRCEXCL 0x05
399 #define TXBUFCLR 0x09
401 #define RXENABLE 0x12
402 #define RXDISABLE 0x13
403 #define RXCRCINIT 0x14
404 #define RXREJECT 0x15
405 #define SEARCHMP 0x16
406 #define RXCRCEXCL 0x17
407 #define RXCRCCALC 0x18
411 /* DMA command codes */
413 #define FEICLEAR 0x02
447 * Global linked list of SyncLink devices
449 static SLMP_INFO *synclinkmp_device_list = NULL;
450 static int synclinkmp_adapter_count = -1;
451 static int synclinkmp_device_count = 0;
454 * Set this param to non-zero to load eax with the
455 * .text section address and breakpoint on module load.
456 * This is useful for use with gdb and add-symbol-file command.
458 static int break_on_load = 0;
461 * Driver major number, defaults to zero to get auto
462 * assigned major number. May be forced as module parameter.
464 static int ttymajor = 0;
467 * Array of user specified options for ISA adapters.
469 static int debug_level = 0;
470 static int maxframe[MAX_DEVICES] = {0,};
472 module_param(break_on_load, bool, 0);
473 module_param(ttymajor, int, 0);
474 module_param(debug_level, int, 0);
475 module_param_array(maxframe, int, NULL, 0);
477 static char *driver_name = "SyncLink MultiPort driver";
478 static char *driver_version = "$Revision: 4.38 $";
480 static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
481 static void synclinkmp_remove_one(struct pci_dev *dev);
483 static struct pci_device_id synclinkmp_pci_tbl[] = {
484 { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
485 { 0, }, /* terminate list */
487 MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
489 MODULE_LICENSE("GPL");
491 static struct pci_driver synclinkmp_pci_driver = {
492 .name = "synclinkmp",
493 .id_table = synclinkmp_pci_tbl,
494 .probe = synclinkmp_init_one,
495 .remove = __devexit_p(synclinkmp_remove_one),
499 static struct tty_driver *serial_driver;
501 /* number of characters left in xmit buffer before we ask for more */
502 #define WAKEUP_CHARS 256
507 static int open(struct tty_struct *tty, struct file * filp);
508 static void close(struct tty_struct *tty, struct file * filp);
509 static void hangup(struct tty_struct *tty);
510 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
512 static int write(struct tty_struct *tty, const unsigned char *buf, int count);
513 static int put_char(struct tty_struct *tty, unsigned char ch);
514 static void send_xchar(struct tty_struct *tty, char ch);
515 static void wait_until_sent(struct tty_struct *tty, int timeout);
516 static int write_room(struct tty_struct *tty);
517 static void flush_chars(struct tty_struct *tty);
518 static void flush_buffer(struct tty_struct *tty);
519 static void tx_hold(struct tty_struct *tty);
520 static void tx_release(struct tty_struct *tty);
522 static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
523 static int read_proc(char *page, char **start, off_t off, int count,int *eof, void *data);
524 static int chars_in_buffer(struct tty_struct *tty);
525 static void throttle(struct tty_struct * tty);
526 static void unthrottle(struct tty_struct * tty);
527 static int set_break(struct tty_struct *tty, int break_state);
529 #if SYNCLINK_GENERIC_HDLC
530 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
531 static void hdlcdev_tx_done(SLMP_INFO *info);
532 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
533 static int hdlcdev_init(SLMP_INFO *info);
534 static void hdlcdev_exit(SLMP_INFO *info);
539 static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
540 static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
541 static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
542 static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
543 static int set_txidle(SLMP_INFO *info, int idle_mode);
544 static int tx_enable(SLMP_INFO *info, int enable);
545 static int tx_abort(SLMP_INFO *info);
546 static int rx_enable(SLMP_INFO *info, int enable);
547 static int modem_input_wait(SLMP_INFO *info,int arg);
548 static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
549 static int tiocmget(struct tty_struct *tty, struct file *file);
550 static int tiocmset(struct tty_struct *tty, struct file *file,
551 unsigned int set, unsigned int clear);
552 static int set_break(struct tty_struct *tty, int break_state);
554 static void add_device(SLMP_INFO *info);
555 static void device_init(int adapter_num, struct pci_dev *pdev);
556 static int claim_resources(SLMP_INFO *info);
557 static void release_resources(SLMP_INFO *info);
559 static int startup(SLMP_INFO *info);
560 static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
561 static int carrier_raised(struct tty_port *port);
562 static void shutdown(SLMP_INFO *info);
563 static void program_hw(SLMP_INFO *info);
564 static void change_params(SLMP_INFO *info);
566 static bool init_adapter(SLMP_INFO *info);
567 static bool register_test(SLMP_INFO *info);
568 static bool irq_test(SLMP_INFO *info);
569 static bool loopback_test(SLMP_INFO *info);
570 static int adapter_test(SLMP_INFO *info);
571 static bool memory_test(SLMP_INFO *info);
573 static void reset_adapter(SLMP_INFO *info);
574 static void reset_port(SLMP_INFO *info);
575 static void async_mode(SLMP_INFO *info);
576 static void hdlc_mode(SLMP_INFO *info);
578 static void rx_stop(SLMP_INFO *info);
579 static void rx_start(SLMP_INFO *info);
580 static void rx_reset_buffers(SLMP_INFO *info);
581 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
582 static bool rx_get_frame(SLMP_INFO *info);
584 static void tx_start(SLMP_INFO *info);
585 static void tx_stop(SLMP_INFO *info);
586 static void tx_load_fifo(SLMP_INFO *info);
587 static void tx_set_idle(SLMP_INFO *info);
588 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
590 static void get_signals(SLMP_INFO *info);
591 static void set_signals(SLMP_INFO *info);
592 static void enable_loopback(SLMP_INFO *info, int enable);
593 static void set_rate(SLMP_INFO *info, u32 data_rate);
595 static int bh_action(SLMP_INFO *info);
596 static void bh_handler(struct work_struct *work);
597 static void bh_receive(SLMP_INFO *info);
598 static void bh_transmit(SLMP_INFO *info);
599 static void bh_status(SLMP_INFO *info);
600 static void isr_timer(SLMP_INFO *info);
601 static void isr_rxint(SLMP_INFO *info);
602 static void isr_rxrdy(SLMP_INFO *info);
603 static void isr_txint(SLMP_INFO *info);
604 static void isr_txrdy(SLMP_INFO *info);
605 static void isr_rxdmaok(SLMP_INFO *info);
606 static void isr_rxdmaerror(SLMP_INFO *info);
607 static void isr_txdmaok(SLMP_INFO *info);
608 static void isr_txdmaerror(SLMP_INFO *info);
609 static void isr_io_pin(SLMP_INFO *info, u16 status);
611 static int alloc_dma_bufs(SLMP_INFO *info);
612 static void free_dma_bufs(SLMP_INFO *info);
613 static int alloc_buf_list(SLMP_INFO *info);
614 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
615 static int alloc_tmp_rx_buf(SLMP_INFO *info);
616 static void free_tmp_rx_buf(SLMP_INFO *info);
618 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
619 static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
620 static void tx_timeout(unsigned long context);
621 static void status_timeout(unsigned long context);
623 static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
624 static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
625 static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
626 static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
627 static unsigned char read_status_reg(SLMP_INFO * info);
628 static void write_control_reg(SLMP_INFO * info);
631 static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
632 static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
633 static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
635 static u32 misc_ctrl_value = 0x007e4040;
636 static u32 lcr1_brdr_value = 0x00800028;
638 static u32 read_ahead_count = 8;
640 /* DPCR, DMA Priority Control
642 * 07..05 Not used, must be 0
643 * 04 BRC, bus release condition: 0=all transfers complete
644 * 1=release after 1 xfer on all channels
645 * 03 CCC, channel change condition: 0=every cycle
646 * 1=after each channel completes all xfers
647 * 02..00 PR<2..0>, priority 100=round robin
651 static unsigned char dma_priority = 0x04;
653 // Number of bytes that can be written to shared RAM
654 // in a single write operation
655 static u32 sca_pci_load_interval = 64;
658 * 1st function defined in .text section. Calling this function in
659 * init_module() followed by a breakpoint allows a remote debugger
660 * (gdb) to get the .text address for the add-symbol-file command.
661 * This allows remote debugging of dynamically loadable modules.
663 static void* synclinkmp_get_text_ptr(void);
664 static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
666 static inline int sanity_check(SLMP_INFO *info,
667 char *name, const char *routine)
670 static const char *badmagic =
671 "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
672 static const char *badinfo =
673 "Warning: null synclinkmp_struct for (%s) in %s\n";
676 printk(badinfo, name, routine);
679 if (info->magic != MGSL_MAGIC) {
680 printk(badmagic, name, routine);
691 * line discipline callback wrappers
693 * The wrappers maintain line discipline references
694 * while calling into the line discipline.
696 * ldisc_receive_buf - pass receive data to line discipline
699 static void ldisc_receive_buf(struct tty_struct *tty,
700 const __u8 *data, char *flags, int count)
702 struct tty_ldisc *ld;
705 ld = tty_ldisc_ref(tty);
707 if (ld->ops->receive_buf)
708 ld->ops->receive_buf(tty, data, flags, count);
715 /* Called when a port is opened. Init and enable port.
717 static int open(struct tty_struct *tty, struct file *filp)
724 if ((line < 0) || (line >= synclinkmp_device_count)) {
725 printk("%s(%d): open with invalid line #%d.\n",
726 __FILE__,__LINE__,line);
730 info = synclinkmp_device_list;
731 while(info && info->line != line)
732 info = info->next_device;
733 if (sanity_check(info, tty->name, "open"))
735 if ( info->init_error ) {
736 printk("%s(%d):%s device is not allocated, init error=%d\n",
737 __FILE__,__LINE__,info->device_name,info->init_error);
741 tty->driver_data = info;
742 info->port.tty = tty;
744 if (debug_level >= DEBUG_LEVEL_INFO)
745 printk("%s(%d):%s open(), old ref count = %d\n",
746 __FILE__,__LINE__,tty->driver->name, info->port.count);
748 /* If port is closing, signal caller to try again */
749 if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
750 if (info->port.flags & ASYNC_CLOSING)
751 interruptible_sleep_on(&info->port.close_wait);
752 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
753 -EAGAIN : -ERESTARTSYS);
757 info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
759 spin_lock_irqsave(&info->netlock, flags);
760 if (info->netcount) {
762 spin_unlock_irqrestore(&info->netlock, flags);
766 spin_unlock_irqrestore(&info->netlock, flags);
768 if (info->port.count == 1) {
769 /* 1st open on this device, init hardware */
770 retval = startup(info);
775 retval = block_til_ready(tty, filp, info);
777 if (debug_level >= DEBUG_LEVEL_INFO)
778 printk("%s(%d):%s block_til_ready() returned %d\n",
779 __FILE__,__LINE__, info->device_name, retval);
783 if (debug_level >= DEBUG_LEVEL_INFO)
784 printk("%s(%d):%s open() success\n",
785 __FILE__,__LINE__, info->device_name);
791 info->port.tty = NULL; /* tty layer will release tty struct */
799 /* Called when port is closed. Wait for remaining data to be
800 * sent. Disable port and free resources.
802 static void close(struct tty_struct *tty, struct file *filp)
804 SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
806 if (sanity_check(info, tty->name, "close"))
809 if (debug_level >= DEBUG_LEVEL_INFO)
810 printk("%s(%d):%s close() entry, count=%d\n",
811 __FILE__,__LINE__, info->device_name, info->port.count);
813 if (!info->port.count)
816 if (tty_hung_up_p(filp))
819 if ((tty->count == 1) && (info->port.count != 1)) {
821 * tty->count is 1 and the tty structure will be freed.
822 * info->port.count should be one in this case.
823 * if it's not, correct it so that the port is shutdown.
825 printk("%s(%d):%s close: bad refcount; tty->count is 1, "
826 "info->port.count is %d\n",
827 __FILE__,__LINE__, info->device_name, info->port.count);
828 info->port.count = 1;
833 /* if at least one open remaining, leave hardware active */
834 if (info->port.count)
837 info->port.flags |= ASYNC_CLOSING;
839 /* set tty->closing to notify line discipline to
840 * only process XON/XOFF characters. Only the N_TTY
841 * discipline appears to use this (ppp does not).
845 /* wait for transmit data to clear all layers */
847 if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
848 if (debug_level >= DEBUG_LEVEL_INFO)
849 printk("%s(%d):%s close() calling tty_wait_until_sent\n",
850 __FILE__,__LINE__, info->device_name );
851 tty_wait_until_sent(tty, info->port.closing_wait);
854 if (info->port.flags & ASYNC_INITIALIZED)
855 wait_until_sent(tty, info->timeout);
859 tty_ldisc_flush(tty);
864 info->port.tty = NULL;
866 if (info->port.blocked_open) {
867 if (info->port.close_delay) {
868 msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
870 wake_up_interruptible(&info->port.open_wait);
873 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
875 wake_up_interruptible(&info->port.close_wait);
878 if (debug_level >= DEBUG_LEVEL_INFO)
879 printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
880 tty->driver->name, info->port.count);
883 /* Called by tty_hangup() when a hangup is signaled.
884 * This is the same as closing all open descriptors for the port.
886 static void hangup(struct tty_struct *tty)
888 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
890 if (debug_level >= DEBUG_LEVEL_INFO)
891 printk("%s(%d):%s hangup()\n",
892 __FILE__,__LINE__, info->device_name );
894 if (sanity_check(info, tty->name, "hangup"))
900 info->port.count = 0;
901 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
902 info->port.tty = NULL;
904 wake_up_interruptible(&info->port.open_wait);
907 /* Set new termios settings
909 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
911 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
914 if (debug_level >= DEBUG_LEVEL_INFO)
915 printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
920 /* Handle transition to B0 status */
921 if (old_termios->c_cflag & CBAUD &&
922 !(tty->termios->c_cflag & CBAUD)) {
923 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
924 spin_lock_irqsave(&info->lock,flags);
926 spin_unlock_irqrestore(&info->lock,flags);
929 /* Handle transition away from B0 status */
930 if (!(old_termios->c_cflag & CBAUD) &&
931 tty->termios->c_cflag & CBAUD) {
932 info->serial_signals |= SerialSignal_DTR;
933 if (!(tty->termios->c_cflag & CRTSCTS) ||
934 !test_bit(TTY_THROTTLED, &tty->flags)) {
935 info->serial_signals |= SerialSignal_RTS;
937 spin_lock_irqsave(&info->lock,flags);
939 spin_unlock_irqrestore(&info->lock,flags);
942 /* Handle turning off CRTSCTS */
943 if (old_termios->c_cflag & CRTSCTS &&
944 !(tty->termios->c_cflag & CRTSCTS)) {
950 /* Send a block of data
954 * tty pointer to tty information structure
955 * buf pointer to buffer containing send data
956 * count size of send data in bytes
958 * Return Value: number of characters written
960 static int write(struct tty_struct *tty,
961 const unsigned char *buf, int count)
964 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
967 if (debug_level >= DEBUG_LEVEL_INFO)
968 printk("%s(%d):%s write() count=%d\n",
969 __FILE__,__LINE__,info->device_name,count);
971 if (sanity_check(info, tty->name, "write"))
977 if (info->params.mode == MGSL_MODE_HDLC) {
978 if (count > info->max_frame_size) {
984 if (info->tx_count) {
985 /* send accumulated data from send_char() calls */
986 /* as frame and wait before accepting more data. */
987 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
990 ret = info->tx_count = count;
991 tx_load_dma_buffer(info, buf, count);
996 c = min_t(int, count,
997 min(info->max_frame_size - info->tx_count - 1,
998 info->max_frame_size - info->tx_put));
1002 memcpy(info->tx_buf + info->tx_put, buf, c);
1004 spin_lock_irqsave(&info->lock,flags);
1006 if (info->tx_put >= info->max_frame_size)
1007 info->tx_put -= info->max_frame_size;
1008 info->tx_count += c;
1009 spin_unlock_irqrestore(&info->lock,flags);
1016 if (info->params.mode == MGSL_MODE_HDLC) {
1018 ret = info->tx_count = 0;
1021 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
1024 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1025 spin_lock_irqsave(&info->lock,flags);
1026 if (!info->tx_active)
1028 spin_unlock_irqrestore(&info->lock,flags);
1032 if (debug_level >= DEBUG_LEVEL_INFO)
1033 printk( "%s(%d):%s write() returning=%d\n",
1034 __FILE__,__LINE__,info->device_name,ret);
1038 /* Add a character to the transmit buffer.
1040 static int put_char(struct tty_struct *tty, unsigned char ch)
1042 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1043 unsigned long flags;
1046 if ( debug_level >= DEBUG_LEVEL_INFO ) {
1047 printk( "%s(%d):%s put_char(%d)\n",
1048 __FILE__,__LINE__,info->device_name,ch);
1051 if (sanity_check(info, tty->name, "put_char"))
1057 spin_lock_irqsave(&info->lock,flags);
1059 if ( (info->params.mode != MGSL_MODE_HDLC) ||
1060 !info->tx_active ) {
1062 if (info->tx_count < info->max_frame_size - 1) {
1063 info->tx_buf[info->tx_put++] = ch;
1064 if (info->tx_put >= info->max_frame_size)
1065 info->tx_put -= info->max_frame_size;
1071 spin_unlock_irqrestore(&info->lock,flags);
1075 /* Send a high-priority XON/XOFF character
1077 static void send_xchar(struct tty_struct *tty, char ch)
1079 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1080 unsigned long flags;
1082 if (debug_level >= DEBUG_LEVEL_INFO)
1083 printk("%s(%d):%s send_xchar(%d)\n",
1084 __FILE__,__LINE__, info->device_name, ch );
1086 if (sanity_check(info, tty->name, "send_xchar"))
1091 /* Make sure transmit interrupts are on */
1092 spin_lock_irqsave(&info->lock,flags);
1093 if (!info->tx_enabled)
1095 spin_unlock_irqrestore(&info->lock,flags);
1099 /* Wait until the transmitter is empty.
1101 static void wait_until_sent(struct tty_struct *tty, int timeout)
1103 SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
1104 unsigned long orig_jiffies, char_time;
1109 if (debug_level >= DEBUG_LEVEL_INFO)
1110 printk("%s(%d):%s wait_until_sent() entry\n",
1111 __FILE__,__LINE__, info->device_name );
1113 if (sanity_check(info, tty->name, "wait_until_sent"))
1118 if (!(info->port.flags & ASYNC_INITIALIZED))
1121 orig_jiffies = jiffies;
1123 /* Set check interval to 1/5 of estimated time to
1124 * send a character, and make it at least 1. The check
1125 * interval should also be less than the timeout.
1126 * Note: use tight timings here to satisfy the NIST-PCTS.
1129 if ( info->params.data_rate ) {
1130 char_time = info->timeout/(32 * 5);
1137 char_time = min_t(unsigned long, char_time, timeout);
1139 if ( info->params.mode == MGSL_MODE_HDLC ) {
1140 while (info->tx_active) {
1141 msleep_interruptible(jiffies_to_msecs(char_time));
1142 if (signal_pending(current))
1144 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1148 //TODO: determine if there is something similar to USC16C32
1149 // TXSTATUS_ALL_SENT status
1150 while ( info->tx_active && info->tx_enabled) {
1151 msleep_interruptible(jiffies_to_msecs(char_time));
1152 if (signal_pending(current))
1154 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1161 if (debug_level >= DEBUG_LEVEL_INFO)
1162 printk("%s(%d):%s wait_until_sent() exit\n",
1163 __FILE__,__LINE__, info->device_name );
1166 /* Return the count of free bytes in transmit buffer
1168 static int write_room(struct tty_struct *tty)
1170 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1173 if (sanity_check(info, tty->name, "write_room"))
1177 if (info->params.mode == MGSL_MODE_HDLC) {
1178 ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
1180 ret = info->max_frame_size - info->tx_count - 1;
1186 if (debug_level >= DEBUG_LEVEL_INFO)
1187 printk("%s(%d):%s write_room()=%d\n",
1188 __FILE__, __LINE__, info->device_name, ret);
1193 /* enable transmitter and send remaining buffered characters
1195 static void flush_chars(struct tty_struct *tty)
1197 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1198 unsigned long flags;
1200 if ( debug_level >= DEBUG_LEVEL_INFO )
1201 printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
1202 __FILE__,__LINE__,info->device_name,info->tx_count);
1204 if (sanity_check(info, tty->name, "flush_chars"))
1207 if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
1211 if ( debug_level >= DEBUG_LEVEL_INFO )
1212 printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
1213 __FILE__,__LINE__,info->device_name );
1215 spin_lock_irqsave(&info->lock,flags);
1217 if (!info->tx_active) {
1218 if ( (info->params.mode == MGSL_MODE_HDLC) &&
1220 /* operating in synchronous (frame oriented) mode */
1221 /* copy data from circular tx_buf to */
1222 /* transmit DMA buffer. */
1223 tx_load_dma_buffer(info,
1224 info->tx_buf,info->tx_count);
1229 spin_unlock_irqrestore(&info->lock,flags);
1232 /* Discard all data in the send buffer
1234 static void flush_buffer(struct tty_struct *tty)
1236 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1237 unsigned long flags;
1239 if (debug_level >= DEBUG_LEVEL_INFO)
1240 printk("%s(%d):%s flush_buffer() entry\n",
1241 __FILE__,__LINE__, info->device_name );
1243 if (sanity_check(info, tty->name, "flush_buffer"))
1246 spin_lock_irqsave(&info->lock,flags);
1247 info->tx_count = info->tx_put = info->tx_get = 0;
1248 del_timer(&info->tx_timer);
1249 spin_unlock_irqrestore(&info->lock,flags);
1254 /* throttle (stop) transmitter
1256 static void tx_hold(struct tty_struct *tty)
1258 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1259 unsigned long flags;
1261 if (sanity_check(info, tty->name, "tx_hold"))
1264 if ( debug_level >= DEBUG_LEVEL_INFO )
1265 printk("%s(%d):%s tx_hold()\n",
1266 __FILE__,__LINE__,info->device_name);
1268 spin_lock_irqsave(&info->lock,flags);
1269 if (info->tx_enabled)
1271 spin_unlock_irqrestore(&info->lock,flags);
1274 /* release (start) transmitter
1276 static void tx_release(struct tty_struct *tty)
1278 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1279 unsigned long flags;
1281 if (sanity_check(info, tty->name, "tx_release"))
1284 if ( debug_level >= DEBUG_LEVEL_INFO )
1285 printk("%s(%d):%s tx_release()\n",
1286 __FILE__,__LINE__,info->device_name);
1288 spin_lock_irqsave(&info->lock,flags);
1289 if (!info->tx_enabled)
1291 spin_unlock_irqrestore(&info->lock,flags);
1294 /* Service an IOCTL request
1298 * tty pointer to tty instance data
1299 * file pointer to associated file object for device
1300 * cmd IOCTL command code
1301 * arg command argument/context
1303 * Return Value: 0 if success, otherwise error code
1305 static int do_ioctl(struct tty_struct *tty, struct file *file,
1306 unsigned int cmd, unsigned long arg)
1308 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1310 struct mgsl_icount cnow; /* kernel counter temps */
1311 struct serial_icounter_struct __user *p_cuser; /* user space */
1312 unsigned long flags;
1313 void __user *argp = (void __user *)arg;
1315 if (debug_level >= DEBUG_LEVEL_INFO)
1316 printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
1317 info->device_name, cmd );
1319 if (sanity_check(info, tty->name, "ioctl"))
1322 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1323 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1324 if (tty->flags & (1 << TTY_IO_ERROR))
1329 case MGSL_IOCGPARAMS:
1330 return get_params(info, argp);
1331 case MGSL_IOCSPARAMS:
1332 return set_params(info, argp);
1333 case MGSL_IOCGTXIDLE:
1334 return get_txidle(info, argp);
1335 case MGSL_IOCSTXIDLE:
1336 return set_txidle(info, (int)arg);
1337 case MGSL_IOCTXENABLE:
1338 return tx_enable(info, (int)arg);
1339 case MGSL_IOCRXENABLE:
1340 return rx_enable(info, (int)arg);
1341 case MGSL_IOCTXABORT:
1342 return tx_abort(info);
1343 case MGSL_IOCGSTATS:
1344 return get_stats(info, argp);
1345 case MGSL_IOCWAITEVENT:
1346 return wait_mgsl_event(info, argp);
1347 case MGSL_IOCLOOPTXDONE:
1348 return 0; // TODO: Not supported, need to document
1349 /* Wait for modem input (DCD,RI,DSR,CTS) change
1350 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
1353 return modem_input_wait(info,(int)arg);
1356 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1357 * Return: write counters to the user passed counter struct
1358 * NB: both 1->0 and 0->1 transitions are counted except for
1359 * RI where only 0->1 is counted.
1362 spin_lock_irqsave(&info->lock,flags);
1363 cnow = info->icount;
1364 spin_unlock_irqrestore(&info->lock,flags);
1366 PUT_USER(error,cnow.cts, &p_cuser->cts);
1367 if (error) return error;
1368 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
1369 if (error) return error;
1370 PUT_USER(error,cnow.rng, &p_cuser->rng);
1371 if (error) return error;
1372 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
1373 if (error) return error;
1374 PUT_USER(error,cnow.rx, &p_cuser->rx);
1375 if (error) return error;
1376 PUT_USER(error,cnow.tx, &p_cuser->tx);
1377 if (error) return error;
1378 PUT_USER(error,cnow.frame, &p_cuser->frame);
1379 if (error) return error;
1380 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
1381 if (error) return error;
1382 PUT_USER(error,cnow.parity, &p_cuser->parity);
1383 if (error) return error;
1384 PUT_USER(error,cnow.brk, &p_cuser->brk);
1385 if (error) return error;
1386 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
1387 if (error) return error;
1390 return -ENOIOCTLCMD;
1395 static int ioctl(struct tty_struct *tty, struct file *file,
1396 unsigned int cmd, unsigned long arg)
1400 ret = do_ioctl(tty, file, cmd, arg);
1406 * /proc fs routines....
1409 static inline int line_info(char *buf, SLMP_INFO *info)
1413 unsigned long flags;
1415 ret = sprintf(buf, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
1416 "\tIRQ=%d MaxFrameSize=%u\n",
1418 info->phys_sca_base,
1419 info->phys_memory_base,
1420 info->phys_statctrl_base,
1421 info->phys_lcr_base,
1423 info->max_frame_size );
1425 /* output current serial signal states */
1426 spin_lock_irqsave(&info->lock,flags);
1428 spin_unlock_irqrestore(&info->lock,flags);
1432 if (info->serial_signals & SerialSignal_RTS)
1433 strcat(stat_buf, "|RTS");
1434 if (info->serial_signals & SerialSignal_CTS)
1435 strcat(stat_buf, "|CTS");
1436 if (info->serial_signals & SerialSignal_DTR)
1437 strcat(stat_buf, "|DTR");
1438 if (info->serial_signals & SerialSignal_DSR)
1439 strcat(stat_buf, "|DSR");
1440 if (info->serial_signals & SerialSignal_DCD)
1441 strcat(stat_buf, "|CD");
1442 if (info->serial_signals & SerialSignal_RI)
1443 strcat(stat_buf, "|RI");
1445 if (info->params.mode == MGSL_MODE_HDLC) {
1446 ret += sprintf(buf+ret, "\tHDLC txok:%d rxok:%d",
1447 info->icount.txok, info->icount.rxok);
1448 if (info->icount.txunder)
1449 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
1450 if (info->icount.txabort)
1451 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
1452 if (info->icount.rxshort)
1453 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
1454 if (info->icount.rxlong)
1455 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
1456 if (info->icount.rxover)
1457 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
1458 if (info->icount.rxcrc)
1459 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc);
1461 ret += sprintf(buf+ret, "\tASYNC tx:%d rx:%d",
1462 info->icount.tx, info->icount.rx);
1463 if (info->icount.frame)
1464 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
1465 if (info->icount.parity)
1466 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
1467 if (info->icount.brk)
1468 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
1469 if (info->icount.overrun)
1470 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
1473 /* Append serial signal status to end */
1474 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
1476 ret += sprintf(buf+ret, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
1477 info->tx_active,info->bh_requested,info->bh_running,
1483 /* Called to print information about devices
1485 static int read_proc(char *page, char **start, off_t off, int count,
1486 int *eof, void *data)
1492 len += sprintf(page, "synclinkmp driver:%s\n", driver_version);
1494 info = synclinkmp_device_list;
1496 l = line_info(page + len, info);
1498 if (len+begin > off+count)
1500 if (len+begin < off) {
1504 info = info->next_device;
1509 if (off >= len+begin)
1511 *start = page + (off-begin);
1512 return ((count < begin+len-off) ? count : begin+len-off);
1515 /* Return the count of bytes in transmit buffer
1517 static int chars_in_buffer(struct tty_struct *tty)
1519 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1521 if (sanity_check(info, tty->name, "chars_in_buffer"))
1524 if (debug_level >= DEBUG_LEVEL_INFO)
1525 printk("%s(%d):%s chars_in_buffer()=%d\n",
1526 __FILE__, __LINE__, info->device_name, info->tx_count);
1528 return info->tx_count;
1531 /* Signal remote device to throttle send data (our receive data)
1533 static void throttle(struct tty_struct * tty)
1535 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1536 unsigned long flags;
1538 if (debug_level >= DEBUG_LEVEL_INFO)
1539 printk("%s(%d):%s throttle() entry\n",
1540 __FILE__,__LINE__, info->device_name );
1542 if (sanity_check(info, tty->name, "throttle"))
1546 send_xchar(tty, STOP_CHAR(tty));
1548 if (tty->termios->c_cflag & CRTSCTS) {
1549 spin_lock_irqsave(&info->lock,flags);
1550 info->serial_signals &= ~SerialSignal_RTS;
1552 spin_unlock_irqrestore(&info->lock,flags);
1556 /* Signal remote device to stop throttling send data (our receive data)
1558 static void unthrottle(struct tty_struct * tty)
1560 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1561 unsigned long flags;
1563 if (debug_level >= DEBUG_LEVEL_INFO)
1564 printk("%s(%d):%s unthrottle() entry\n",
1565 __FILE__,__LINE__, info->device_name );
1567 if (sanity_check(info, tty->name, "unthrottle"))
1574 send_xchar(tty, START_CHAR(tty));
1577 if (tty->termios->c_cflag & CRTSCTS) {
1578 spin_lock_irqsave(&info->lock,flags);
1579 info->serial_signals |= SerialSignal_RTS;
1581 spin_unlock_irqrestore(&info->lock,flags);
1585 /* set or clear transmit break condition
1586 * break_state -1=set break condition, 0=clear
1588 static int set_break(struct tty_struct *tty, int break_state)
1590 unsigned char RegValue;
1591 SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
1592 unsigned long flags;
1594 if (debug_level >= DEBUG_LEVEL_INFO)
1595 printk("%s(%d):%s set_break(%d)\n",
1596 __FILE__,__LINE__, info->device_name, break_state);
1598 if (sanity_check(info, tty->name, "set_break"))
1601 spin_lock_irqsave(&info->lock,flags);
1602 RegValue = read_reg(info, CTL);
1603 if (break_state == -1)
1607 write_reg(info, CTL, RegValue);
1608 spin_unlock_irqrestore(&info->lock,flags);
1612 #if SYNCLINK_GENERIC_HDLC
1615 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
1616 * set encoding and frame check sequence (FCS) options
1618 * dev pointer to network device structure
1619 * encoding serial encoding setting
1620 * parity FCS setting
1622 * returns 0 if success, otherwise error code
1624 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
1625 unsigned short parity)
1627 SLMP_INFO *info = dev_to_port(dev);
1628 unsigned char new_encoding;
1629 unsigned short new_crctype;
1631 /* return error if TTY interface open */
1632 if (info->port.count)
1637 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
1638 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
1639 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
1640 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
1641 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
1642 default: return -EINVAL;
1647 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
1648 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
1649 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
1650 default: return -EINVAL;
1653 info->params.encoding = new_encoding;
1654 info->params.crc_type = new_crctype;
1656 /* if network interface up, reprogram hardware */
1664 * called by generic HDLC layer to send frame
1666 * skb socket buffer containing HDLC frame
1667 * dev pointer to network device structure
1669 * returns 0 if success, otherwise error code
1671 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
1673 SLMP_INFO *info = dev_to_port(dev);
1674 unsigned long flags;
1676 if (debug_level >= DEBUG_LEVEL_INFO)
1677 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
1679 /* stop sending until this frame completes */
1680 netif_stop_queue(dev);
1682 /* copy data to device buffers */
1683 info->tx_count = skb->len;
1684 tx_load_dma_buffer(info, skb->data, skb->len);
1686 /* update network statistics */
1687 dev->stats.tx_packets++;
1688 dev->stats.tx_bytes += skb->len;
1690 /* done with socket buffer, so free it */
1693 /* save start time for transmit timeout detection */
1694 dev->trans_start = jiffies;
1696 /* start hardware transmitter if necessary */
1697 spin_lock_irqsave(&info->lock,flags);
1698 if (!info->tx_active)
1700 spin_unlock_irqrestore(&info->lock,flags);
1706 * called by network layer when interface enabled
1707 * claim resources and initialize hardware
1709 * dev pointer to network device structure
1711 * returns 0 if success, otherwise error code
1713 static int hdlcdev_open(struct net_device *dev)
1715 SLMP_INFO *info = dev_to_port(dev);
1717 unsigned long flags;
1719 if (debug_level >= DEBUG_LEVEL_INFO)
1720 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
1722 /* generic HDLC layer open processing */
1723 if ((rc = hdlc_open(dev)))
1726 /* arbitrate between network and tty opens */
1727 spin_lock_irqsave(&info->netlock, flags);
1728 if (info->port.count != 0 || info->netcount != 0) {
1729 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
1730 spin_unlock_irqrestore(&info->netlock, flags);
1734 spin_unlock_irqrestore(&info->netlock, flags);
1736 /* claim resources and init adapter */
1737 if ((rc = startup(info)) != 0) {
1738 spin_lock_irqsave(&info->netlock, flags);
1740 spin_unlock_irqrestore(&info->netlock, flags);
1744 /* assert DTR and RTS, apply hardware settings */
1745 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1748 /* enable network layer transmit */
1749 dev->trans_start = jiffies;
1750 netif_start_queue(dev);
1752 /* inform generic HDLC layer of current DCD status */
1753 spin_lock_irqsave(&info->lock, flags);
1755 spin_unlock_irqrestore(&info->lock, flags);
1756 if (info->serial_signals & SerialSignal_DCD)
1757 netif_carrier_on(dev);
1759 netif_carrier_off(dev);
1764 * called by network layer when interface is disabled
1765 * shutdown hardware and release resources
1767 * dev pointer to network device structure
1769 * returns 0 if success, otherwise error code
1771 static int hdlcdev_close(struct net_device *dev)
1773 SLMP_INFO *info = dev_to_port(dev);
1774 unsigned long flags;
1776 if (debug_level >= DEBUG_LEVEL_INFO)
1777 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
1779 netif_stop_queue(dev);
1781 /* shutdown adapter and release resources */
1786 spin_lock_irqsave(&info->netlock, flags);
1788 spin_unlock_irqrestore(&info->netlock, flags);
1794 * called by network layer to process IOCTL call to network device
1796 * dev pointer to network device structure
1797 * ifr pointer to network interface request structure
1798 * cmd IOCTL command code
1800 * returns 0 if success, otherwise error code
1802 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1804 const size_t size = sizeof(sync_serial_settings);
1805 sync_serial_settings new_line;
1806 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
1807 SLMP_INFO *info = dev_to_port(dev);
1810 if (debug_level >= DEBUG_LEVEL_INFO)
1811 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
1813 /* return error if TTY interface open */
1814 if (info->port.count)
1817 if (cmd != SIOCWANDEV)
1818 return hdlc_ioctl(dev, ifr, cmd);
1820 switch(ifr->ifr_settings.type) {
1821 case IF_GET_IFACE: /* return current sync_serial_settings */
1823 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
1824 if (ifr->ifr_settings.size < size) {
1825 ifr->ifr_settings.size = size; /* data size wanted */
1829 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1830 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1831 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1832 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1835 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
1836 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
1837 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
1838 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
1839 default: new_line.clock_type = CLOCK_DEFAULT;
1842 new_line.clock_rate = info->params.clock_speed;
1843 new_line.loopback = info->params.loopback ? 1:0;
1845 if (copy_to_user(line, &new_line, size))
1849 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
1851 if(!capable(CAP_NET_ADMIN))
1853 if (copy_from_user(&new_line, line, size))
1856 switch (new_line.clock_type)
1858 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
1859 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
1860 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
1861 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
1862 case CLOCK_DEFAULT: flags = info->params.flags &
1863 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1864 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1865 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1866 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
1867 default: return -EINVAL;
1870 if (new_line.loopback != 0 && new_line.loopback != 1)
1873 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1874 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1875 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1876 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1877 info->params.flags |= flags;
1879 info->params.loopback = new_line.loopback;
1881 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
1882 info->params.clock_speed = new_line.clock_rate;
1884 info->params.clock_speed = 0;
1886 /* if network interface up, reprogram hardware */
1892 return hdlc_ioctl(dev, ifr, cmd);
1897 * called by network layer when transmit timeout is detected
1899 * dev pointer to network device structure
1901 static void hdlcdev_tx_timeout(struct net_device *dev)
1903 SLMP_INFO *info = dev_to_port(dev);
1904 unsigned long flags;
1906 if (debug_level >= DEBUG_LEVEL_INFO)
1907 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
1909 dev->stats.tx_errors++;
1910 dev->stats.tx_aborted_errors++;
1912 spin_lock_irqsave(&info->lock,flags);
1914 spin_unlock_irqrestore(&info->lock,flags);
1916 netif_wake_queue(dev);
1920 * called by device driver when transmit completes
1921 * reenable network layer transmit if stopped
1923 * info pointer to device instance information
1925 static void hdlcdev_tx_done(SLMP_INFO *info)
1927 if (netif_queue_stopped(info->netdev))
1928 netif_wake_queue(info->netdev);
1932 * called by device driver when frame received
1933 * pass frame to network layer
1935 * info pointer to device instance information
1936 * buf pointer to buffer contianing frame data
1937 * size count of data bytes in buf
1939 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
1941 struct sk_buff *skb = dev_alloc_skb(size);
1942 struct net_device *dev = info->netdev;
1944 if (debug_level >= DEBUG_LEVEL_INFO)
1945 printk("hdlcdev_rx(%s)\n",dev->name);
1948 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
1950 dev->stats.rx_dropped++;
1954 memcpy(skb_put(skb, size), buf, size);
1956 skb->protocol = hdlc_type_trans(skb, dev);
1958 dev->stats.rx_packets++;
1959 dev->stats.rx_bytes += size;
1963 dev->last_rx = jiffies;
1967 * called by device driver when adding device instance
1968 * do generic HDLC initialization
1970 * info pointer to device instance information
1972 * returns 0 if success, otherwise error code
1974 static int hdlcdev_init(SLMP_INFO *info)
1977 struct net_device *dev;
1980 /* allocate and initialize network and HDLC layer objects */
1982 if (!(dev = alloc_hdlcdev(info))) {
1983 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
1987 /* for network layer reporting purposes only */
1988 dev->mem_start = info->phys_sca_base;
1989 dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
1990 dev->irq = info->irq_level;
1992 /* network layer callbacks and settings */
1993 dev->do_ioctl = hdlcdev_ioctl;
1994 dev->open = hdlcdev_open;
1995 dev->stop = hdlcdev_close;
1996 dev->tx_timeout = hdlcdev_tx_timeout;
1997 dev->watchdog_timeo = 10*HZ;
1998 dev->tx_queue_len = 50;
2000 /* generic HDLC layer callbacks and settings */
2001 hdlc = dev_to_hdlc(dev);
2002 hdlc->attach = hdlcdev_attach;
2003 hdlc->xmit = hdlcdev_xmit;
2005 /* register objects with HDLC layer */
2006 if ((rc = register_hdlc_device(dev))) {
2007 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
2017 * called by device driver when removing device instance
2018 * do generic HDLC cleanup
2020 * info pointer to device instance information
2022 static void hdlcdev_exit(SLMP_INFO *info)
2024 unregister_hdlc_device(info->netdev);
2025 free_netdev(info->netdev);
2026 info->netdev = NULL;
2029 #endif /* CONFIG_HDLC */
2032 /* Return next bottom half action to perform.
2033 * Return Value: BH action code or 0 if nothing to do.
2035 static int bh_action(SLMP_INFO *info)
2037 unsigned long flags;
2040 spin_lock_irqsave(&info->lock,flags);
2042 if (info->pending_bh & BH_RECEIVE) {
2043 info->pending_bh &= ~BH_RECEIVE;
2045 } else if (info->pending_bh & BH_TRANSMIT) {
2046 info->pending_bh &= ~BH_TRANSMIT;
2048 } else if (info->pending_bh & BH_STATUS) {
2049 info->pending_bh &= ~BH_STATUS;
2054 /* Mark BH routine as complete */
2055 info->bh_running = false;
2056 info->bh_requested = false;
2059 spin_unlock_irqrestore(&info->lock,flags);
2064 /* Perform bottom half processing of work items queued by ISR.
2066 static void bh_handler(struct work_struct *work)
2068 SLMP_INFO *info = container_of(work, SLMP_INFO, task);
2074 if ( debug_level >= DEBUG_LEVEL_BH )
2075 printk( "%s(%d):%s bh_handler() entry\n",
2076 __FILE__,__LINE__,info->device_name);
2078 info->bh_running = true;
2080 while((action = bh_action(info)) != 0) {
2082 /* Process work item */
2083 if ( debug_level >= DEBUG_LEVEL_BH )
2084 printk( "%s(%d):%s bh_handler() work item action=%d\n",
2085 __FILE__,__LINE__,info->device_name, action);
2099 /* unknown work item ID */
2100 printk("%s(%d):%s Unknown work item ID=%08X!\n",
2101 __FILE__,__LINE__,info->device_name,action);
2106 if ( debug_level >= DEBUG_LEVEL_BH )
2107 printk( "%s(%d):%s bh_handler() exit\n",
2108 __FILE__,__LINE__,info->device_name);
2111 static void bh_receive(SLMP_INFO *info)
2113 if ( debug_level >= DEBUG_LEVEL_BH )
2114 printk( "%s(%d):%s bh_receive()\n",
2115 __FILE__,__LINE__,info->device_name);
2117 while( rx_get_frame(info) );
2120 static void bh_transmit(SLMP_INFO *info)
2122 struct tty_struct *tty = info->port.tty;
2124 if ( debug_level >= DEBUG_LEVEL_BH )
2125 printk( "%s(%d):%s bh_transmit() entry\n",
2126 __FILE__,__LINE__,info->device_name);
2132 static void bh_status(SLMP_INFO *info)
2134 if ( debug_level >= DEBUG_LEVEL_BH )
2135 printk( "%s(%d):%s bh_status() entry\n",
2136 __FILE__,__LINE__,info->device_name);
2138 info->ri_chkcount = 0;
2139 info->dsr_chkcount = 0;
2140 info->dcd_chkcount = 0;
2141 info->cts_chkcount = 0;
2144 static void isr_timer(SLMP_INFO * info)
2146 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
2148 /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
2149 write_reg(info, IER2, 0);
2151 /* TMCS, Timer Control/Status Register
2153 * 07 CMF, Compare match flag (read only) 1=match
2154 * 06 ECMI, CMF Interrupt Enable: 0=disabled
2155 * 05 Reserved, must be 0
2156 * 04 TME, Timer Enable
2157 * 03..00 Reserved, must be 0
2161 write_reg(info, (unsigned char)(timer + TMCS), 0);
2163 info->irq_occurred = true;
2165 if ( debug_level >= DEBUG_LEVEL_ISR )
2166 printk("%s(%d):%s isr_timer()\n",
2167 __FILE__,__LINE__,info->device_name);
2170 static void isr_rxint(SLMP_INFO * info)
2172 struct tty_struct *tty = info->port.tty;
2173 struct mgsl_icount *icount = &info->icount;
2174 unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
2175 unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
2177 /* clear status bits */
2179 write_reg(info, SR1, status);
2182 write_reg(info, SR2, status2);
2184 if ( debug_level >= DEBUG_LEVEL_ISR )
2185 printk("%s(%d):%s isr_rxint status=%02X %02x\n",
2186 __FILE__,__LINE__,info->device_name,status,status2);
2188 if (info->params.mode == MGSL_MODE_ASYNC) {
2189 if (status & BRKD) {
2192 /* process break detection if tty control
2193 * is not set to ignore it
2196 if (!(status & info->ignore_status_mask1)) {
2197 if (info->read_status_mask1 & BRKD) {
2198 tty_insert_flip_char(tty, 0, TTY_BREAK);
2199 if (info->port.flags & ASYNC_SAK)
2207 if (status & (FLGD|IDLD)) {
2209 info->icount.exithunt++;
2210 else if (status & IDLD)
2211 info->icount.rxidle++;
2212 wake_up_interruptible(&info->event_wait_q);
2216 if (status & CDCD) {
2217 /* simulate a common modem status change interrupt
2220 get_signals( info );
2222 MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
2227 * handle async rx data interrupts
2229 static void isr_rxrdy(SLMP_INFO * info)
2232 unsigned char DataByte;
2233 struct tty_struct *tty = info->port.tty;
2234 struct mgsl_icount *icount = &info->icount;
2236 if ( debug_level >= DEBUG_LEVEL_ISR )
2237 printk("%s(%d):%s isr_rxrdy\n",
2238 __FILE__,__LINE__,info->device_name);
2240 while((status = read_reg(info,CST0)) & BIT0)
2244 DataByte = read_reg(info,TRB);
2248 if ( status & (PE + FRME + OVRN) ) {
2249 printk("%s(%d):%s rxerr=%04X\n",
2250 __FILE__,__LINE__,info->device_name,status);
2252 /* update error statistics */
2255 else if (status & FRME)
2257 else if (status & OVRN)
2260 /* discard char if tty control flags say so */
2261 if (status & info->ignore_status_mask2)
2264 status &= info->read_status_mask2;
2269 else if (status & FRME)
2271 if (status & OVRN) {
2272 /* Overrun is special, since it's
2273 * reported immediately, and doesn't
2274 * affect the current character
2279 } /* end of if (error) */
2282 tty_insert_flip_char(tty, DataByte, flag);
2284 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
2288 if ( debug_level >= DEBUG_LEVEL_ISR ) {
2289 printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
2290 __FILE__,__LINE__,info->device_name,
2291 icount->rx,icount->brk,icount->parity,
2292 icount->frame,icount->overrun);
2296 tty_flip_buffer_push(tty);
2299 static void isr_txeom(SLMP_INFO * info, unsigned char status)
2301 if ( debug_level >= DEBUG_LEVEL_ISR )
2302 printk("%s(%d):%s isr_txeom status=%02x\n",
2303 __FILE__,__LINE__,info->device_name,status);
2305 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2306 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2307 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2309 if (status & UDRN) {
2310 write_reg(info, CMD, TXRESET);
2311 write_reg(info, CMD, TXENABLE);
2313 write_reg(info, CMD, TXBUFCLR);
2315 /* disable and clear tx interrupts */
2316 info->ie0_value &= ~TXRDYE;
2317 info->ie1_value &= ~(IDLE + UDRN);
2318 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2319 write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
2321 if ( info->tx_active ) {
2322 if (info->params.mode != MGSL_MODE_ASYNC) {
2324 info->icount.txunder++;
2325 else if (status & IDLE)
2326 info->icount.txok++;
2329 info->tx_active = false;
2330 info->tx_count = info->tx_put = info->tx_get = 0;
2332 del_timer(&info->tx_timer);
2334 if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
2335 info->serial_signals &= ~SerialSignal_RTS;
2336 info->drop_rts_on_tx_done = false;
2340 #if SYNCLINK_GENERIC_HDLC
2342 hdlcdev_tx_done(info);
2346 if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
2350 info->pending_bh |= BH_TRANSMIT;
2357 * handle tx status interrupts
2359 static void isr_txint(SLMP_INFO * info)
2361 unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
2363 /* clear status bits */
2364 write_reg(info, SR1, status);
2366 if ( debug_level >= DEBUG_LEVEL_ISR )
2367 printk("%s(%d):%s isr_txint status=%02x\n",
2368 __FILE__,__LINE__,info->device_name,status);
2370 if (status & (UDRN + IDLE))
2371 isr_txeom(info, status);
2373 if (status & CCTS) {
2374 /* simulate a common modem status change interrupt
2377 get_signals( info );
2379 MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
2385 * handle async tx data interrupts
2387 static void isr_txrdy(SLMP_INFO * info)
2389 if ( debug_level >= DEBUG_LEVEL_ISR )
2390 printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
2391 __FILE__,__LINE__,info->device_name,info->tx_count);
2393 if (info->params.mode != MGSL_MODE_ASYNC) {
2394 /* disable TXRDY IRQ, enable IDLE IRQ */
2395 info->ie0_value &= ~TXRDYE;
2396 info->ie1_value |= IDLE;
2397 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2401 if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
2406 if ( info->tx_count )
2407 tx_load_fifo( info );
2409 info->tx_active = false;
2410 info->ie0_value &= ~TXRDYE;
2411 write_reg(info, IE0, info->ie0_value);
2414 if (info->tx_count < WAKEUP_CHARS)
2415 info->pending_bh |= BH_TRANSMIT;
2418 static void isr_rxdmaok(SLMP_INFO * info)
2420 /* BIT7 = EOT (end of transfer)
2421 * BIT6 = EOM (end of message/frame)
2423 unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
2425 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2426 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2428 if ( debug_level >= DEBUG_LEVEL_ISR )
2429 printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
2430 __FILE__,__LINE__,info->device_name,status);
2432 info->pending_bh |= BH_RECEIVE;
2435 static void isr_rxdmaerror(SLMP_INFO * info)
2437 /* BIT5 = BOF (buffer overflow)
2438 * BIT4 = COF (counter overflow)
2440 unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
2442 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2443 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2445 if ( debug_level >= DEBUG_LEVEL_ISR )
2446 printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
2447 __FILE__,__LINE__,info->device_name,status);
2449 info->rx_overflow = true;
2450 info->pending_bh |= BH_RECEIVE;
2453 static void isr_txdmaok(SLMP_INFO * info)
2455 unsigned char status_reg1 = read_reg(info, SR1);
2457 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2458 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2459 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2461 if ( debug_level >= DEBUG_LEVEL_ISR )
2462 printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
2463 __FILE__,__LINE__,info->device_name,status_reg1);
2465 /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
2466 write_reg16(info, TRC0, 0);
2467 info->ie0_value |= TXRDYE;
2468 write_reg(info, IE0, info->ie0_value);
2471 static void isr_txdmaerror(SLMP_INFO * info)
2473 /* BIT5 = BOF (buffer overflow)
2474 * BIT4 = COF (counter overflow)
2476 unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
2478 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2479 write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
2481 if ( debug_level >= DEBUG_LEVEL_ISR )
2482 printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
2483 __FILE__,__LINE__,info->device_name,status);
2486 /* handle input serial signal changes
2488 static void isr_io_pin( SLMP_INFO *info, u16 status )
2490 struct mgsl_icount *icount;
2492 if ( debug_level >= DEBUG_LEVEL_ISR )
2493 printk("%s(%d):isr_io_pin status=%04X\n",
2494 __FILE__,__LINE__,status);
2496 if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
2497 MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
2498 icount = &info->icount;
2499 /* update input line counters */
2500 if (status & MISCSTATUS_RI_LATCHED) {
2502 if ( status & SerialSignal_RI )
2503 info->input_signal_events.ri_up++;
2505 info->input_signal_events.ri_down++;
2507 if (status & MISCSTATUS_DSR_LATCHED) {
2509 if ( status & SerialSignal_DSR )
2510 info->input_signal_events.dsr_up++;
2512 info->input_signal_events.dsr_down++;
2514 if (status & MISCSTATUS_DCD_LATCHED) {
2515 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2516 info->ie1_value &= ~CDCD;
2517 write_reg(info, IE1, info->ie1_value);
2520 if (status & SerialSignal_DCD) {
2521 info->input_signal_events.dcd_up++;
2523 info->input_signal_events.dcd_down++;
2524 #if SYNCLINK_GENERIC_HDLC
2525 if (info->netcount) {
2526 if (status & SerialSignal_DCD)
2527 netif_carrier_on(info->netdev);
2529 netif_carrier_off(info->netdev);
2533 if (status & MISCSTATUS_CTS_LATCHED)
2535 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2536 info->ie1_value &= ~CCTS;
2537 write_reg(info, IE1, info->ie1_value);
2540 if ( status & SerialSignal_CTS )
2541 info->input_signal_events.cts_up++;
2543 info->input_signal_events.cts_down++;
2545 wake_up_interruptible(&info->status_event_wait_q);
2546 wake_up_interruptible(&info->event_wait_q);
2548 if ( (info->port.flags & ASYNC_CHECK_CD) &&
2549 (status & MISCSTATUS_DCD_LATCHED) ) {
2550 if ( debug_level >= DEBUG_LEVEL_ISR )
2551 printk("%s CD now %s...", info->device_name,
2552 (status & SerialSignal_DCD) ? "on" : "off");
2553 if (status & SerialSignal_DCD)
2554 wake_up_interruptible(&info->port.open_wait);
2556 if ( debug_level >= DEBUG_LEVEL_ISR )
2557 printk("doing serial hangup...");
2559 tty_hangup(info->port.tty);
2563 if ( (info->port.flags & ASYNC_CTS_FLOW) &&
2564 (status & MISCSTATUS_CTS_LATCHED) ) {
2565 if ( info->port.tty ) {
2566 if (info->port.tty->hw_stopped) {
2567 if (status & SerialSignal_CTS) {
2568 if ( debug_level >= DEBUG_LEVEL_ISR )
2569 printk("CTS tx start...");
2570 info->port.tty->hw_stopped = 0;
2572 info->pending_bh |= BH_TRANSMIT;
2576 if (!(status & SerialSignal_CTS)) {
2577 if ( debug_level >= DEBUG_LEVEL_ISR )
2578 printk("CTS tx stop...");
2579 info->port.tty->hw_stopped = 1;
2587 info->pending_bh |= BH_STATUS;
2590 /* Interrupt service routine entry point.
2593 * irq interrupt number that caused interrupt
2594 * dev_id device ID supplied during interrupt registration
2595 * regs interrupted processor context
2597 static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
2599 SLMP_INFO *info = dev_id;
2600 unsigned char status, status0, status1=0;
2601 unsigned char dmastatus, dmastatus0, dmastatus1=0;
2602 unsigned char timerstatus0, timerstatus1=0;
2603 unsigned char shift;
2607 if ( debug_level >= DEBUG_LEVEL_ISR )
2608 printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
2609 __FILE__, __LINE__, info->irq_level);
2611 spin_lock(&info->lock);
2615 /* get status for SCA0 (ports 0-1) */
2616 tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
2617 status0 = (unsigned char)tmp;
2618 dmastatus0 = (unsigned char)(tmp>>8);
2619 timerstatus0 = read_reg(info, ISR2);
2621 if ( debug_level >= DEBUG_LEVEL_ISR )
2622 printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
2623 __FILE__, __LINE__, info->device_name,
2624 status0, dmastatus0, timerstatus0);
2626 if (info->port_count == 4) {
2627 /* get status for SCA1 (ports 2-3) */
2628 tmp = read_reg16(info->port_array[2], ISR0);
2629 status1 = (unsigned char)tmp;
2630 dmastatus1 = (unsigned char)(tmp>>8);
2631 timerstatus1 = read_reg(info->port_array[2], ISR2);
2633 if ( debug_level >= DEBUG_LEVEL_ISR )
2634 printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
2635 __FILE__,__LINE__,info->device_name,
2636 status1,dmastatus1,timerstatus1);
2639 if (!status0 && !dmastatus0 && !timerstatus0 &&
2640 !status1 && !dmastatus1 && !timerstatus1)
2643 for(i=0; i < info->port_count ; i++) {
2644 if (info->port_array[i] == NULL)
2648 dmastatus = dmastatus0;
2651 dmastatus = dmastatus1;
2654 shift = i & 1 ? 4 :0;
2656 if (status & BIT0 << shift)
2657 isr_rxrdy(info->port_array[i]);
2658 if (status & BIT1 << shift)
2659 isr_txrdy(info->port_array[i]);
2660 if (status & BIT2 << shift)
2661 isr_rxint(info->port_array[i]);
2662 if (status & BIT3 << shift)
2663 isr_txint(info->port_array[i]);
2665 if (dmastatus & BIT0 << shift)
2666 isr_rxdmaerror(info->port_array[i]);
2667 if (dmastatus & BIT1 << shift)
2668 isr_rxdmaok(info->port_array[i]);
2669 if (dmastatus & BIT2 << shift)
2670 isr_txdmaerror(info->port_array[i]);
2671 if (dmastatus & BIT3 << shift)
2672 isr_txdmaok(info->port_array[i]);
2675 if (timerstatus0 & (BIT5 | BIT4))
2676 isr_timer(info->port_array[0]);
2677 if (timerstatus0 & (BIT7 | BIT6))
2678 isr_timer(info->port_array[1]);
2679 if (timerstatus1 & (BIT5 | BIT4))
2680 isr_timer(info->port_array[2]);
2681 if (timerstatus1 & (BIT7 | BIT6))
2682 isr_timer(info->port_array[3]);
2685 for(i=0; i < info->port_count ; i++) {
2686 SLMP_INFO * port = info->port_array[i];
2688 /* Request bottom half processing if there's something
2689 * for it to do and the bh is not already running.
2691 * Note: startup adapter diags require interrupts.
2692 * do not request bottom half processing if the
2693 * device is not open in a normal mode.
2695 if ( port && (port->port.count || port->netcount) &&
2696 port->pending_bh && !port->bh_running &&
2697 !port->bh_requested ) {
2698 if ( debug_level >= DEBUG_LEVEL_ISR )
2699 printk("%s(%d):%s queueing bh task.\n",
2700 __FILE__,__LINE__,port->device_name);
2701 schedule_work(&port->task);
2702 port->bh_requested = true;
2706 spin_unlock(&info->lock);
2708 if ( debug_level >= DEBUG_LEVEL_ISR )
2709 printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
2710 __FILE__, __LINE__, info->irq_level);
2714 /* Initialize and start device.
2716 static int startup(SLMP_INFO * info)
2718 if ( debug_level >= DEBUG_LEVEL_INFO )
2719 printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
2721 if (info->port.flags & ASYNC_INITIALIZED)
2724 if (!info->tx_buf) {
2725 info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
2726 if (!info->tx_buf) {
2727 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
2728 __FILE__,__LINE__,info->device_name);
2733 info->pending_bh = 0;
2735 memset(&info->icount, 0, sizeof(info->icount));
2737 /* program hardware for current parameters */
2740 change_params(info);
2742 mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
2745 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
2747 info->port.flags |= ASYNC_INITIALIZED;
2752 /* Called by close() and hangup() to shutdown hardware
2754 static void shutdown(SLMP_INFO * info)
2756 unsigned long flags;
2758 if (!(info->port.flags & ASYNC_INITIALIZED))
2761 if (debug_level >= DEBUG_LEVEL_INFO)
2762 printk("%s(%d):%s synclinkmp_shutdown()\n",
2763 __FILE__,__LINE__, info->device_name );
2765 /* clear status wait queue because status changes */
2766 /* can't happen after shutting down the hardware */
2767 wake_up_interruptible(&info->status_event_wait_q);
2768 wake_up_interruptible(&info->event_wait_q);
2770 del_timer(&info->tx_timer);
2771 del_timer(&info->status_timer);
2773 kfree(info->tx_buf);
2774 info->tx_buf = NULL;
2776 spin_lock_irqsave(&info->lock,flags);
2780 if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
2781 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
2785 spin_unlock_irqrestore(&info->lock,flags);
2788 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2790 info->port.flags &= ~ASYNC_INITIALIZED;
2793 static void program_hw(SLMP_INFO *info)
2795 unsigned long flags;
2797 spin_lock_irqsave(&info->lock,flags);
2802 info->tx_count = info->tx_put = info->tx_get = 0;
2804 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
2811 info->dcd_chkcount = 0;
2812 info->cts_chkcount = 0;
2813 info->ri_chkcount = 0;
2814 info->dsr_chkcount = 0;
2816 info->ie1_value |= (CDCD|CCTS);
2817 write_reg(info, IE1, info->ie1_value);
2821 if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) )
2824 spin_unlock_irqrestore(&info->lock,flags);
2827 /* Reconfigure adapter based on new parameters
2829 static void change_params(SLMP_INFO *info)
2834 if (!info->port.tty || !info->port.tty->termios)
2837 if (debug_level >= DEBUG_LEVEL_INFO)
2838 printk("%s(%d):%s change_params()\n",
2839 __FILE__,__LINE__, info->device_name );
2841 cflag = info->port.tty->termios->c_cflag;
2843 /* if B0 rate (hangup) specified then negate DTR and RTS */
2844 /* otherwise assert DTR and RTS */
2846 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2848 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2850 /* byte size and parity */
2852 switch (cflag & CSIZE) {
2853 case CS5: info->params.data_bits = 5; break;
2854 case CS6: info->params.data_bits = 6; break;
2855 case CS7: info->params.data_bits = 7; break;
2856 case CS8: info->params.data_bits = 8; break;
2857 /* Never happens, but GCC is too dumb to figure it out */
2858 default: info->params.data_bits = 7; break;
2862 info->params.stop_bits = 2;
2864 info->params.stop_bits = 1;
2866 info->params.parity = ASYNC_PARITY_NONE;
2867 if (cflag & PARENB) {
2869 info->params.parity = ASYNC_PARITY_ODD;
2871 info->params.parity = ASYNC_PARITY_EVEN;
2874 info->params.parity = ASYNC_PARITY_SPACE;
2878 /* calculate number of jiffies to transmit a full
2879 * FIFO (32 bytes) at specified data rate
2881 bits_per_char = info->params.data_bits +
2882 info->params.stop_bits + 1;
2884 /* if port data rate is set to 460800 or less then
2885 * allow tty settings to override, otherwise keep the
2886 * current data rate.
2888 if (info->params.data_rate <= 460800) {
2889 info->params.data_rate = tty_get_baud_rate(info->port.tty);
2892 if ( info->params.data_rate ) {
2893 info->timeout = (32*HZ*bits_per_char) /
2894 info->params.data_rate;
2896 info->timeout += HZ/50; /* Add .02 seconds of slop */
2898 if (cflag & CRTSCTS)
2899 info->port.flags |= ASYNC_CTS_FLOW;
2901 info->port.flags &= ~ASYNC_CTS_FLOW;
2904 info->port.flags &= ~ASYNC_CHECK_CD;
2906 info->port.flags |= ASYNC_CHECK_CD;
2908 /* process tty input control flags */
2910 info->read_status_mask2 = OVRN;
2911 if (I_INPCK(info->port.tty))
2912 info->read_status_mask2 |= PE | FRME;
2913 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
2914 info->read_status_mask1 |= BRKD;
2915 if (I_IGNPAR(info->port.tty))
2916 info->ignore_status_mask2 |= PE | FRME;
2917 if (I_IGNBRK(info->port.tty)) {
2918 info->ignore_status_mask1 |= BRKD;
2919 /* If ignoring parity and break indicators, ignore
2920 * overruns too. (For real raw support).
2922 if (I_IGNPAR(info->port.tty))
2923 info->ignore_status_mask2 |= OVRN;
2929 static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
2933 if (debug_level >= DEBUG_LEVEL_INFO)
2934 printk("%s(%d):%s get_params()\n",
2935 __FILE__,__LINE__, info->device_name);
2938 memset(&info->icount, 0, sizeof(info->icount));
2940 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
2948 static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
2951 if (debug_level >= DEBUG_LEVEL_INFO)
2952 printk("%s(%d):%s get_params()\n",
2953 __FILE__,__LINE__, info->device_name);
2955 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
2957 if ( debug_level >= DEBUG_LEVEL_INFO )
2958 printk( "%s(%d):%s get_params() user buffer copy failed\n",
2959 __FILE__,__LINE__,info->device_name);
2966 static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
2968 unsigned long flags;
2969 MGSL_PARAMS tmp_params;
2972 if (debug_level >= DEBUG_LEVEL_INFO)
2973 printk("%s(%d):%s set_params\n",
2974 __FILE__,__LINE__,info->device_name );
2975 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
2977 if ( debug_level >= DEBUG_LEVEL_INFO )
2978 printk( "%s(%d):%s set_params() user buffer copy failed\n",
2979 __FILE__,__LINE__,info->device_name);
2983 spin_lock_irqsave(&info->lock,flags);
2984 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
2985 spin_unlock_irqrestore(&info->lock,flags);
2987 change_params(info);
2992 static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
2996 if (debug_level >= DEBUG_LEVEL_INFO)
2997 printk("%s(%d):%s get_txidle()=%d\n",
2998 __FILE__,__LINE__, info->device_name, info->idle_mode);
3000 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
3002 if ( debug_level >= DEBUG_LEVEL_INFO )
3003 printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
3004 __FILE__,__LINE__,info->device_name);
3011 static int set_txidle(SLMP_INFO * info, int idle_mode)
3013 unsigned long flags;
3015 if (debug_level >= DEBUG_LEVEL_INFO)
3016 printk("%s(%d):%s set_txidle(%d)\n",
3017 __FILE__,__LINE__,info->device_name, idle_mode );
3019 spin_lock_irqsave(&info->lock,flags);
3020 info->idle_mode = idle_mode;
3021 tx_set_idle( info );
3022 spin_unlock_irqrestore(&info->lock,flags);
3026 static int tx_enable(SLMP_INFO * info, int enable)
3028 unsigned long flags;
3030 if (debug_level >= DEBUG_LEVEL_INFO)
3031 printk("%s(%d):%s tx_enable(%d)\n",
3032 __FILE__,__LINE__,info->device_name, enable);
3034 spin_lock_irqsave(&info->lock,flags);
3036 if ( !info->tx_enabled ) {
3040 if ( info->tx_enabled )
3043 spin_unlock_irqrestore(&info->lock,flags);
3047 /* abort send HDLC frame
3049 static int tx_abort(SLMP_INFO * info)
3051 unsigned long flags;
3053 if (debug_level >= DEBUG_LEVEL_INFO)
3054 printk("%s(%d):%s tx_abort()\n",
3055 __FILE__,__LINE__,info->device_name);
3057 spin_lock_irqsave(&info->lock,flags);
3058 if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
3059 info->ie1_value &= ~UDRN;
3060 info->ie1_value |= IDLE;
3061 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
3062 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
3064 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
3065 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
3067 write_reg(info, CMD, TXABORT);
3069 spin_unlock_irqrestore(&info->lock,flags);
3073 static int rx_enable(SLMP_INFO * info, int enable)
3075 unsigned long flags;
3077 if (debug_level >= DEBUG_LEVEL_INFO)
3078 printk("%s(%d):%s rx_enable(%d)\n",
3079 __FILE__,__LINE__,info->device_name,enable);
3081 spin_lock_irqsave(&info->lock,flags);
3083 if ( !info->rx_enabled )
3086 if ( info->rx_enabled )
3089 spin_unlock_irqrestore(&info->lock,flags);
3093 /* wait for specified event to occur
3095 static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
3097 unsigned long flags;
3100 struct mgsl_icount cprev, cnow;
3103 struct _input_signal_events oldsigs, newsigs;
3104 DECLARE_WAITQUEUE(wait, current);
3106 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
3111 if (debug_level >= DEBUG_LEVEL_INFO)
3112 printk("%s(%d):%s wait_mgsl_event(%d)\n",
3113 __FILE__,__LINE__,info->device_name,mask);
3115 spin_lock_irqsave(&info->lock,flags);
3117 /* return immediately if state matches requested events */
3119 s = info->serial_signals;
3122 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
3123 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
3124 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
3125 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
3127 spin_unlock_irqrestore(&info->lock,flags);
3131 /* save current irq counts */
3132 cprev = info->icount;
3133 oldsigs = info->input_signal_events;
3135 /* enable hunt and idle irqs if needed */
3136 if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
3137 unsigned char oldval = info->ie1_value;
3138 unsigned char newval = oldval +
3139 (mask & MgslEvent_ExitHuntMode ? FLGD:0) +
3140 (mask & MgslEvent_IdleReceived ? IDLD:0);
3141 if ( oldval != newval ) {
3142 info->ie1_value = newval;
3143 write_reg(info, IE1, info->ie1_value);
3147 set_current_state(TASK_INTERRUPTIBLE);
3148 add_wait_queue(&info->event_wait_q, &wait);
3150 spin_unlock_irqrestore(&info->lock,flags);
3154 if (signal_pending(current)) {
3159 /* get current irq counts */
3160 spin_lock_irqsave(&info->lock,flags);
3161 cnow = info->icount;
3162 newsigs = info->input_signal_events;
3163 set_current_state(TASK_INTERRUPTIBLE);
3164 spin_unlock_irqrestore(&info->lock,flags);
3166 /* if no change, wait aborted for some reason */
3167 if (newsigs.dsr_up == oldsigs.dsr_up &&
3168 newsigs.dsr_down == oldsigs.dsr_down &&
3169 newsigs.dcd_up == oldsigs.dcd_up &&
3170 newsigs.dcd_down == oldsigs.dcd_down &&
3171 newsigs.cts_up == oldsigs.cts_up &&
3172 newsigs.cts_down == oldsigs.cts_down &&
3173 newsigs.ri_up == oldsigs.ri_up &&
3174 newsigs.ri_down == oldsigs.ri_down &&
3175 cnow.exithunt == cprev.exithunt &&
3176 cnow.rxidle == cprev.rxidle) {
3182 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
3183 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
3184 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
3185 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
3186 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
3187 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
3188 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
3189 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
3190 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
3191 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
3199 remove_wait_queue(&info->event_wait_q, &wait);
3200 set_current_state(TASK_RUNNING);
3203 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
3204 spin_lock_irqsave(&info->lock,flags);
3205 if (!waitqueue_active(&info->event_wait_q)) {
3206 /* disable enable exit hunt mode/idle rcvd IRQs */
3207 info->ie1_value &= ~(FLGD|IDLD);
3208 write_reg(info, IE1, info->ie1_value);
3210 spin_unlock_irqrestore(&info->lock,flags);
3214 PUT_USER(rc, events, mask_ptr);
3219 static int modem_input_wait(SLMP_INFO *info,int arg)
3221 unsigned long flags;
3223 struct mgsl_icount cprev, cnow;
3224 DECLARE_WAITQUEUE(wait, current);
3226 /* save current irq counts */
3227 spin_lock_irqsave(&info->lock,flags);
3228 cprev = info->icount;
3229 add_wait_queue(&info->status_event_wait_q, &wait);
3230 set_current_state(TASK_INTERRUPTIBLE);
3231 spin_unlock_irqrestore(&info->lock,flags);
3235 if (signal_pending(current)) {
3240 /* get new irq counts */
3241 spin_lock_irqsave(&info->lock,flags);
3242 cnow = info->icount;
3243 set_current_state(TASK_INTERRUPTIBLE);
3244 spin_unlock_irqrestore(&info->lock,flags);
3246 /* if no change, wait aborted for some reason */
3247 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
3248 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
3253 /* check for change in caller specified modem input */
3254 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
3255 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
3256 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
3257 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
3264 remove_wait_queue(&info->status_event_wait_q, &wait);
3265 set_current_state(TASK_RUNNING);
3269 /* return the state of the serial control and status signals
3271 static int tiocmget(struct tty_struct *tty, struct file *file)
3273 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
3274 unsigned int result;
3275 unsigned long flags;
3277 spin_lock_irqsave(&info->lock,flags);
3279 spin_unlock_irqrestore(&info->lock,flags);
3281 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
3282 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
3283 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
3284 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
3285 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
3286 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
3288 if (debug_level >= DEBUG_LEVEL_INFO)
3289 printk("%s(%d):%s tiocmget() value=%08X\n",
3290 __FILE__,__LINE__, info->device_name, result );
3294 /* set modem control signals (DTR/RTS)
3296 static int tiocmset(struct tty_struct *tty, struct file *file,
3297 unsigned int set, unsigned int clear)
3299 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
3300 unsigned long flags;
3302 if (debug_level >= DEBUG_LEVEL_INFO)
3303 printk("%s(%d):%s tiocmset(%x,%x)\n",
3304 __FILE__,__LINE__,info->device_name, set, clear);
3306 if (set & TIOCM_RTS)
3307 info->serial_signals |= SerialSignal_RTS;
3308 if (set & TIOCM_DTR)
3309 info->serial_signals |= SerialSignal_DTR;
3310 if (clear & TIOCM_RTS)
3311 info->serial_signals &= ~SerialSignal_RTS;
3312 if (clear & TIOCM_DTR)
3313 info->serial_signals &= ~SerialSignal_DTR;
3315 spin_lock_irqsave(&info->lock,flags);
3317 spin_unlock_irqrestore(&info->lock,flags);
3322 static int carrier_raised(struct tty_port *port)
3324 SLMP_INFO *info = container_of(port, SLMP_INFO, port);
3325 unsigned long flags;
3327 spin_lock_irqsave(&info->lock,flags);
3329 spin_unlock_irqrestore(&info->lock,flags);
3331 return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
3334 /* Block the current process until the specified port is ready to open.
3336 static int block_til_ready(struct tty_struct *tty, struct file *filp,
3339 DECLARE_WAITQUEUE(wait, current);
3341 bool do_clocal = false;
3342 bool extra_count = false;
3343 unsigned long flags;
3345 struct tty_port *port = &info->port;
3347 if (debug_level >= DEBUG_LEVEL_INFO)
3348 printk("%s(%d):%s block_til_ready()\n",
3349 __FILE__,__LINE__, tty->driver->name );
3351 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
3352 /* nonblock mode is set or port is not enabled */
3353 /* just verify that callout device is not active */
3354 port->flags |= ASYNC_NORMAL_ACTIVE;
3358 if (tty->termios->c_cflag & CLOCAL)
3361 /* Wait for carrier detect and the line to become
3362 * free (i.e., not in use by the callout). While we are in
3363 * this loop, port->count is dropped by one, so that
3364 * close() knows when to free things. We restore it upon
3365 * exit, either normal or abnormal.
3369 add_wait_queue(&port->open_wait, &wait);
3371 if (debug_level >= DEBUG_LEVEL_INFO)
3372 printk("%s(%d):%s block_til_ready() before block, count=%d\n",
3373 __FILE__,__LINE__, tty->driver->name, port->count );
3375 spin_lock_irqsave(&info->lock, flags);
3376 if (!tty_hung_up_p(filp)) {
3380 spin_unlock_irqrestore(&info->lock, flags);
3381 port->blocked_open++;
3384 if ((tty->termios->c_cflag & CBAUD)) {
3385 spin_lock_irqsave(&info->lock,flags);
3386 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
3388 spin_unlock_irqrestore(&info->lock,flags);
3391 set_current_state(TASK_INTERRUPTIBLE);
3393 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
3394 retval = (port->flags & ASYNC_HUP_NOTIFY) ?
3395 -EAGAIN : -ERESTARTSYS;
3399 cd = tty_port_carrier_raised(port);
3401 if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
3404 if (signal_pending(current)) {
3405 retval = -ERESTARTSYS;
3409 if (debug_level >= DEBUG_LEVEL_INFO)
3410 printk("%s(%d):%s block_til_ready() count=%d\n",
3411 __FILE__,__LINE__, tty->driver->name, port->count );
3416 set_current_state(TASK_RUNNING);
3417 remove_wait_queue(&port->open_wait, &wait);
3421 port->blocked_open--;
3423 if (debug_level >= DEBUG_LEVEL_INFO)
3424 printk("%s(%d):%s block_til_ready() after, count=%d\n",
3425 __FILE__,__LINE__, tty->driver->name, port->count );
3428 port->flags |= ASYNC_NORMAL_ACTIVE;
3433 static int alloc_dma_bufs(SLMP_INFO *info)
3435 unsigned short BuffersPerFrame;
3436 unsigned short BufferCount;
3438 // Force allocation to start at 64K boundary for each port.
3439 // This is necessary because *all* buffer descriptors for a port
3440 // *must* be in the same 64K block. All descriptors on a port
3441 // share a common 'base' address (upper 8 bits of 24 bits) programmed
3442 // into the CBP register.
3443 info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
3445 /* Calculate the number of DMA buffers necessary to hold the */
3446 /* largest allowable frame size. Note: If the max frame size is */
3447 /* not an even multiple of the DMA buffer size then we need to */
3448 /* round the buffer count per frame up one. */
3450 BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
3451 if ( info->max_frame_size % SCABUFSIZE )
3454 /* calculate total number of data buffers (SCABUFSIZE) possible
3455 * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
3456 * for the descriptor list (BUFFERLISTSIZE).
3458 BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
3460 /* limit number of buffers to maximum amount of descriptors */
3461 if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
3462 BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
3464 /* use enough buffers to transmit one max size frame */
3465 info->tx_buf_count = BuffersPerFrame + 1;
3467 /* never use more than half the available buffers for transmit */
3468 if (info->tx_buf_count > (BufferCount/2))
3469 info->tx_buf_count = BufferCount/2;
3471 if (info->tx_buf_count > SCAMAXDESC)
3472 info->tx_buf_count = SCAMAXDESC;
3474 /* use remaining buffers for receive */
3475 info->rx_buf_count = BufferCount - info->tx_buf_count;
3477 if (info->rx_buf_count > SCAMAXDESC)
3478 info->rx_buf_count = SCAMAXDESC;
3480 if ( debug_level >= DEBUG_LEVEL_INFO )
3481 printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
3482 __FILE__,__LINE__, info->device_name,
3483 info->tx_buf_count,info->rx_buf_count);
3485 if ( alloc_buf_list( info ) < 0 ||
3486 alloc_frame_bufs(info,
3488 info->rx_buf_list_ex,
3489 info->rx_buf_count) < 0 ||
3490 alloc_frame_bufs(info,
3492 info->tx_buf_list_ex,
3493 info->tx_buf_count) < 0 ||
3494 alloc_tmp_rx_buf(info) < 0 ) {
3495 printk("%s(%d):%s Can't allocate DMA buffer memory\n",
3496 __FILE__,__LINE__, info->device_name);
3500 rx_reset_buffers( info );
3505 /* Allocate DMA buffers for the transmit and receive descriptor lists.
3507 static int alloc_buf_list(SLMP_INFO *info)
3511 /* build list in adapter shared memory */
3512 info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
3513 info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
3514 info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
3516 memset(info->buffer_list, 0, BUFFERLISTSIZE);
3518 /* Save virtual address pointers to the receive and */
3519 /* transmit buffer lists. (Receive 1st). These pointers will */
3520 /* be used by the processor to access the lists. */
3521 info->rx_buf_list = (SCADESC *)info->buffer_list;
3523 info->tx_buf_list = (SCADESC *)info->buffer_list;
3524 info->tx_buf_list += info->rx_buf_count;
3526 /* Build links for circular buffer entry lists (tx and rx)
3528 * Note: links are physical addresses read by the SCA device
3529 * to determine the next buffer entry to use.
3532 for ( i = 0; i < info->rx_buf_count; i++ ) {
3533 /* calculate and store physical address of this buffer entry */
3534 info->rx_buf_list_ex[i].phys_entry =
3535 info->buffer_list_phys + (i * sizeof(SCABUFSIZE));
3537 /* calculate and store physical address of */
3538 /* next entry in cirular list of entries */
3539 info->rx_buf_list[i].next = info->buffer_list_phys;
3540 if ( i < info->rx_buf_count - 1 )
3541 info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3543 info->rx_buf_list[i].length = SCABUFSIZE;
3546 for ( i = 0; i < info->tx_buf_count; i++ ) {
3547 /* calculate and store physical address of this buffer entry */
3548 info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
3549 ((info->rx_buf_count + i) * sizeof(SCADESC));
3551 /* calculate and store physical address of */
3552 /* next entry in cirular list of entries */
3554 info->tx_buf_list[i].next = info->buffer_list_phys +
3555 info->rx_buf_count * sizeof(SCADESC);
3557 if ( i < info->tx_buf_count - 1 )
3558 info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3564 /* Allocate the frame DMA buffers used by the specified buffer list.
3566 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
3569 unsigned long phys_addr;
3571 for ( i = 0; i < count; i++ ) {
3572 buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
3573 phys_addr = info->port_array[0]->last_mem_alloc;
3574 info->port_array[0]->last_mem_alloc += SCABUFSIZE;
3576 buf_list[i].buf_ptr = (unsigned short)phys_addr;
3577 buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
3583 static void free_dma_bufs(SLMP_INFO *info)
3585 info->buffer_list = NULL;
3586 info->rx_buf_list = NULL;
3587 info->tx_buf_list = NULL;
3590 /* allocate buffer large enough to hold max_frame_size.
3591 * This buffer is used to pass an assembled frame to the line discipline.
3593 static int alloc_tmp_rx_buf(SLMP_INFO *info)
3595 info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
3596 if (info->tmp_rx_buf == NULL)
3601 static void free_tmp_rx_buf(SLMP_INFO *info)
3603 kfree(info->tmp_rx_buf);
3604 info->tmp_rx_buf = NULL;
3607 static int claim_resources(SLMP_INFO *info)
3609 if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
3610 printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
3611 __FILE__,__LINE__,info->device_name, info->phys_memory_base);
3612 info->init_error = DiagStatus_AddressConflict;
3616 info->shared_mem_requested = true;
3618 if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
3619 printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
3620 __FILE__,__LINE__,info->device_name, info->phys_lcr_base);
3621 info->init_error = DiagStatus_AddressConflict;
3625 info->lcr_mem_requested = true;
3627 if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
3628 printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
3629 __FILE__,__LINE__,info->device_name, info->phys_sca_base);
3630 info->init_error = DiagStatus_AddressConflict;
3634 info->sca_base_requested = true;
3636 if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
3637 printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
3638 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
3639 info->init_error = DiagStatus_AddressConflict;
3643 info->sca_statctrl_requested = true;
3645 info->memory_base = ioremap_nocache(info->phys_memory_base,
3647 if (!info->memory_base) {
3648 printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n",
3649 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3650 info->init_error = DiagStatus_CantAssignPciResources;
3654 info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE);
3655 if (!info->lcr_base) {
3656 printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n",
3657 __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
3658 info->init_error = DiagStatus_CantAssignPciResources;
3661 info->lcr_base += info->lcr_offset;
3663 info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE);
3664 if (!info->sca_base) {
3665 printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n",
3666 __FILE__,__LINE__,info->device_name, info->phys_sca_base );
3667 info->init_error = DiagStatus_CantAssignPciResources;
3670 info->sca_base += info->sca_offset;
3672 info->statctrl_base = ioremap_nocache(info->phys_statctrl_base,
3674 if (!info->statctrl_base) {
3675 printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n",
3676 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
3677 info->init_error = DiagStatus_CantAssignPciResources;
3680 info->statctrl_base += info->statctrl_offset;
3682 if ( !memory_test(info) ) {
3683 printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
3684 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3685 info->init_error = DiagStatus_MemoryError;
3692 release_resources( info );
3696 static void release_resources(SLMP_INFO *info)
3698 if ( debug_level >= DEBUG_LEVEL_INFO )
3699 printk( "%s(%d):%s release_resources() entry\n",
3700 __FILE__,__LINE__,info->device_name );
3702 if ( info->irq_requested ) {
3703 free_irq(info->irq_level, info);
3704 info->irq_requested = false;
3707 if ( info->shared_mem_requested ) {
3708 release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
3709 info->shared_mem_requested = false;
3711 if ( info->lcr_mem_requested ) {
3712 release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
3713 info->lcr_mem_requested = false;
3715 if ( info->sca_base_requested ) {
3716 release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
3717 info->sca_base_requested = false;
3719 if ( info->sca_statctrl_requested ) {
3720 release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
3721 info->sca_statctrl_requested = false;
3724 if (info->memory_base){
3725 iounmap(info->memory_base);
3726 info->memory_base = NULL;
3729 if (info->sca_base) {
3730 iounmap(info->sca_base - info->sca_offset);
3731 info->sca_base=NULL;
3734 if (info->statctrl_base) {
3735 iounmap(info->statctrl_base - info->statctrl_offset);
3736 info->statctrl_base=NULL;
3739 if (info->lcr_base){
3740 iounmap(info->lcr_base - info->lcr_offset);
3741 info->lcr_base = NULL;
3744 if ( debug_level >= DEBUG_LEVEL_INFO )
3745 printk( "%s(%d):%s release_resources() exit\n",
3746 __FILE__,__LINE__,info->device_name );
3749 /* Add the specified device instance data structure to the
3750 * global linked list of devices and increment the device count.
3752 static void add_device(SLMP_INFO *info)
3754 info->next_device = NULL;
3755 info->line = synclinkmp_device_count;
3756 sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
3758 if (info->line < MAX_DEVICES) {
3759 if (maxframe[info->line])
3760 info->max_frame_size = maxframe[info->line];
3763 synclinkmp_device_count++;
3765 if ( !synclinkmp_device_list )
3766 synclinkmp_device_list = info;
3768 SLMP_INFO *current_dev = synclinkmp_device_list;
3769 while( current_dev->next_device )
3770 current_dev = current_dev->next_device;
3771 current_dev->next_device = info;
3774 if ( info->max_frame_size < 4096 )
3775 info->max_frame_size = 4096;
3776 else if ( info->max_frame_size > 65535 )
3777 info->max_frame_size = 65535;
3779 printk( "SyncLink MultiPort %s: "
3780 "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
3782 info->phys_sca_base,
3783 info->phys_memory_base,
3784 info->phys_statctrl_base,
3785 info->phys_lcr_base,
3787 info->max_frame_size );
3789 #if SYNCLINK_GENERIC_HDLC
3794 static const struct tty_port_operations port_ops = {
3795 .carrier_raised = carrier_raised,
3798 /* Allocate and initialize a device instance structure
3800 * Return Value: pointer to SLMP_INFO if success, otherwise NULL
3802 static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
3806 info = kzalloc(sizeof(SLMP_INFO),
3810 printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
3811 __FILE__,__LINE__, adapter_num, port_num);
3813 tty_port_init(&info->port);
3814 info->port.ops = &port_ops;
3815 info->magic = MGSL_MAGIC;
3816 INIT_WORK(&info->task, bh_handler);
3817 info->max_frame_size = 4096;
3818 info->port.close_delay = 5*HZ/10;
3819 info->port.closing_wait = 30*HZ;
3820 init_waitqueue_head(&info->status_event_wait_q);
3821 init_waitqueue_head(&info->event_wait_q);
3822 spin_lock_init(&info->netlock);
3823 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
3824 info->idle_mode = HDLC_TXIDLE_FLAGS;
3825 info->adapter_num = adapter_num;
3826 info->port_num = port_num;
3828 /* Copy configuration info to device instance data */
3829 info->irq_level = pdev->irq;
3830 info->phys_lcr_base = pci_resource_start(pdev,0);
3831 info->phys_sca_base = pci_resource_start(pdev,2);
3832 info->phys_memory_base = pci_resource_start(pdev,3);
3833 info->phys_statctrl_base = pci_resource_start(pdev,4);
3835 /* Because veremap only works on page boundaries we must map
3836 * a larger area than is actually implemented for the LCR
3837 * memory range. We map a full page starting at the page boundary.
3839 info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
3840 info->phys_lcr_base &= ~(PAGE_SIZE-1);
3842 info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
3843 info->phys_sca_base &= ~(PAGE_SIZE-1);
3845 info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
3846 info->phys_statctrl_base &= ~(PAGE_SIZE-1);
3848 info->bus_type = MGSL_BUS_TYPE_PCI;
3849 info->irq_flags = IRQF_SHARED;
3851 setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
3852 setup_timer(&info->status_timer, status_timeout,
3853 (unsigned long)info);
3855 /* Store the PCI9050 misc control register value because a flaw
3856 * in the PCI9050 prevents LCR registers from being read if
3857 * BIOS assigns an LCR base address with bit 7 set.
3859 * Only the misc control register is accessed for which only
3860 * write access is needed, so set an initial value and change
3861 * bits to the device instance data as we write the value
3862 * to the actual misc control register.
3864 info->misc_ctrl_value = 0x087e4546;
3866 /* initial port state is unknown - if startup errors
3867 * occur, init_error will be set to indicate the
3868 * problem. Once the port is fully initialized,
3869 * this value will be set to 0 to indicate the
3870 * port is available.
3872 info->init_error = -1;
3878 static void device_init(int adapter_num, struct pci_dev *pdev)
3880 SLMP_INFO *port_array[SCA_MAX_PORTS];
3883 /* allocate device instances for up to SCA_MAX_PORTS devices */
3884 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3885 port_array[port] = alloc_dev(adapter_num,port,pdev);
3886 if( port_array[port] == NULL ) {
3887 for ( --port; port >= 0; --port )
3888 kfree(port_array[port]);
3893 /* give copy of port_array to all ports and add to device list */
3894 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3895 memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
3896 add_device( port_array[port] );
3897 spin_lock_init(&port_array[port]->lock);
3900 /* Allocate and claim adapter resources */
3901 if ( !claim_resources(port_array[0]) ) {
3903 alloc_dma_bufs(port_array[0]);
3905 /* copy resource information from first port to others */
3906 for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
3907 port_array[port]->lock = port_array[0]->lock;
3908 port_array[port]->irq_level = port_array[0]->irq_level;
3909 port_array[port]->memory_base = port_array[0]->memory_base;
3910 port_array[port]->sca_base = port_array[0]->sca_base;
3911 port_array[port]->statctrl_base = port_array[0]->statctrl_base;
3912 port_array[port]->lcr_base = port_array[0]->lcr_base;
3913 alloc_dma_bufs(port_array[port]);
3916 if ( request_irq(port_array[0]->irq_level,
3917 synclinkmp_interrupt,
3918 port_array[0]->irq_flags,
3919 port_array[0]->device_name,
3920 port_array[0]) < 0 ) {
3921 printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n",
3923 port_array[0]->device_name,
3924 port_array[0]->irq_level );
3927 port_array[0]->irq_requested = true;
3928 adapter_test(port_array[0]);
3933 static const struct tty_operations ops = {
3937 .put_char = put_char,
3938 .flush_chars = flush_chars,
3939 .write_room = write_room,
3940 .chars_in_buffer = chars_in_buffer,
3941 .flush_buffer = flush_buffer,
3943 .throttle = throttle,
3944 .unthrottle = unthrottle,
3945 .send_xchar = send_xchar,
3946 .break_ctl = set_break,
3947 .wait_until_sent = wait_until_sent,
3948 .read_proc = read_proc,
3949 .set_termios = set_termios,
3951 .start = tx_release,
3953 .tiocmget = tiocmget,
3954 .tiocmset = tiocmset,
3958 static void synclinkmp_cleanup(void)
3964 printk("Unloading %s %s\n", driver_name, driver_version);
3966 if (serial_driver) {
3967 if ((rc = tty_unregister_driver(serial_driver)))
3968 printk("%s(%d) failed to unregister tty driver err=%d\n",
3969 __FILE__,__LINE__,rc);
3970 put_tty_driver(serial_driver);
3974 info = synclinkmp_device_list;
3977 info = info->next_device;
3980 /* release devices */
3981 info = synclinkmp_device_list;
3983 #if SYNCLINK_GENERIC_HDLC
3986 free_dma_bufs(info);
3987 free_tmp_rx_buf(info);
3988 if ( info->port_num == 0 ) {
3990 write_reg(info, LPR, 1); /* set low power mode */
3991 release_resources(info);
3994 info = info->next_device;
3998 pci_unregister_driver(&synclinkmp_pci_driver);
4001 /* Driver initialization entry point.
4004 static int __init synclinkmp_init(void)
4008 if (break_on_load) {
4009 synclinkmp_get_text_ptr();
4013 printk("%s %s\n", driver_name, driver_version);
4015 if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
4016 printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
4020 serial_driver = alloc_tty_driver(128);
4021 if (!serial_driver) {
4026 /* Initialize the tty_driver structure */
4028 serial_driver->owner = THIS_MODULE;
4029 serial_driver->driver_name = "synclinkmp";
4030 serial_driver->name = "ttySLM";
4031 serial_driver->major = ttymajor;
4032 serial_driver->minor_start = 64;
4033 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4034 serial_driver->subtype = SERIAL_TYPE_NORMAL;
4035 serial_driver->init_termios = tty_std_termios;
4036 serial_driver->init_termios.c_cflag =
4037 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4038 serial_driver->init_termios.c_ispeed = 9600;
4039 serial_driver->init_termios.c_ospeed = 9600;
4040 serial_driver->flags = TTY_DRIVER_REAL_RAW;
4041 tty_set_operations(serial_driver, &ops);
4042 if ((rc = tty_register_driver(serial_driver)) < 0) {
4043 printk("%s(%d):Couldn't register serial driver\n",
4045 put_tty_driver(serial_driver);
4046 serial_driver = NULL;
4050 printk("%s %s, tty major#%d\n",
4051 driver_name, driver_version,
4052 serial_driver->major);
4057 synclinkmp_cleanup();
4061 static void __exit synclinkmp_exit(void)
4063 synclinkmp_cleanup();
4066 module_init(synclinkmp_init);
4067 module_exit(synclinkmp_exit);
4069 /* Set the port for internal loopback mode.
4070 * The TxCLK and RxCLK signals are generated from the BRG and
4071 * the TxD is looped back to the RxD internally.
4073 static void enable_loopback(SLMP_INFO *info, int enable)
4076 /* MD2 (Mode Register 2)
4077 * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
4079 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
4081 /* degate external TxC clock source */
4082 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4083 write_control_reg(info);
4085 /* RXS/TXS (Rx/Tx clock source)
4086 * 07 Reserved, must be 0
4087 * 06..04 Clock Source, 100=BRG
4088 * 03..00 Clock Divisor, 0000=1
4090 write_reg(info, RXS, 0x40);
4091 write_reg(info, TXS, 0x40);
4094 /* MD2 (Mode Register 2)
4095 * 01..00 CNCT<1..0> Channel connection, 0=normal
4097 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
4099 /* RXS/TXS (Rx/Tx clock source)
4100 * 07 Reserved, must be 0
4101 * 06..04 Clock Source, 000=RxC/TxC Pin
4102 * 03..00 Clock Divisor, 0000=1
4104 write_reg(info, RXS, 0x00);
4105 write_reg(info, TXS, 0x00);
4108 /* set LinkSpeed if available, otherwise default to 2Mbps */
4109 if (info->params.clock_speed)
4110 set_rate(info, info->params.clock_speed);
4112 set_rate(info, 3686400);
4115 /* Set the baud rate register to the desired speed
4117 * data_rate data rate of clock in bits per second
4118 * A data rate of 0 disables the AUX clock.
4120 static void set_rate( SLMP_INFO *info, u32 data_rate )
4123 unsigned char BRValue;
4126 /* fBRG = fCLK/(TMC * 2^BR)
4128 if (data_rate != 0) {
4129 Divisor = 14745600/data_rate;
4136 if (TMCValue != 1 && TMCValue != 2) {
4137 /* BRValue of 0 provides 50/50 duty cycle *only* when
4138 * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
4145 /* while TMCValue is too big for TMC register, divide
4146 * by 2 and increment BR exponent.
4148 for(; TMCValue > 256 && BRValue < 10; BRValue++)
4151 write_reg(info, TXS,
4152 (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
4153 write_reg(info, RXS,
4154 (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
4155 write_reg(info, TMC, (unsigned char)TMCValue);
4158 write_reg(info, TXS,0);
4159 write_reg(info, RXS,0);
4160 write_reg(info, TMC, 0);
4166 static void rx_stop(SLMP_INFO *info)
4168 if (debug_level >= DEBUG_LEVEL_ISR)
4169 printk("%s(%d):%s rx_stop()\n",
4170 __FILE__,__LINE__, info->device_name );
4172 write_reg(info, CMD, RXRESET);
4174 info->ie0_value &= ~RXRDYE;
4175 write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
4177 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4178 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4179 write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
4181 info->rx_enabled = false;
4182 info->rx_overflow = false;
4185 /* enable the receiver
4187 static void rx_start(SLMP_INFO *info)
4191 if (debug_level >= DEBUG_LEVEL_ISR)
4192 printk("%s(%d):%s rx_start()\n",
4193 __FILE__,__LINE__, info->device_name );
4195 write_reg(info, CMD, RXRESET);
4197 if ( info->params.mode == MGSL_MODE_HDLC ) {
4198 /* HDLC, disabe IRQ on rxdata */
4199 info->ie0_value &= ~RXRDYE;
4200 write_reg(info, IE0, info->ie0_value);
4202 /* Reset all Rx DMA buffers and program rx dma */
4203 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4204 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4206 for (i = 0; i < info->rx_buf_count; i++) {
4207 info->rx_buf_list[i].status = 0xff;
4209 // throttle to 4 shared memory writes at a time to prevent
4210 // hogging local bus (keep latency time for DMA requests low).
4212 read_status_reg(info);
4214 info->current_rx_buf = 0;
4216 /* set current/1st descriptor address */
4217 write_reg16(info, RXDMA + CDA,
4218 info->rx_buf_list_ex[0].phys_entry);
4220 /* set new last rx descriptor address */
4221 write_reg16(info, RXDMA + EDA,
4222 info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
4224 /* set buffer length (shared by all rx dma data buffers) */
4225 write_reg16(info, RXDMA + BFL, SCABUFSIZE);
4227 write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
4228 write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
4230 /* async, enable IRQ on rxdata */
4231 info->ie0_value |= RXRDYE;
4232 write_reg(info, IE0, info->ie0_value);
4235 write_reg(info, CMD, RXENABLE);
4237 info->rx_overflow = false;
4238 info->rx_enabled = true;
4241 /* Enable the transmitter and send a transmit frame if
4242 * one is loaded in the DMA buffers.
4244 static void tx_start(SLMP_INFO *info)
4246 if (debug_level >= DEBUG_LEVEL_ISR)
4247 printk("%s(%d):%s tx_start() tx_count=%d\n",
4248 __FILE__,__LINE__, info->device_name,info->tx_count );
4250 if (!info->tx_enabled ) {
4251 write_reg(info, CMD, TXRESET);
4252 write_reg(info, CMD, TXENABLE);
4253 info->tx_enabled = true;
4256 if ( info->tx_count ) {
4258 /* If auto RTS enabled and RTS is inactive, then assert */
4259 /* RTS and set a flag indicating that the driver should */
4260 /* negate RTS when the transmission completes. */
4262 info->drop_rts_on_tx_done = false;
4264 if (info->params.mode != MGSL_MODE_ASYNC) {
4266 if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
4267 get_signals( info );
4268 if ( !(info->serial_signals & SerialSignal_RTS) ) {
4269 info->serial_signals |= SerialSignal_RTS;
4270 set_signals( info );
4271 info->drop_rts_on_tx_done = true;
4275 write_reg16(info, TRC0,
4276 (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
4278 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4279 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4281 /* set TX CDA (current descriptor address) */
4282 write_reg16(info, TXDMA + CDA,
4283 info->tx_buf_list_ex[0].phys_entry);
4285 /* set TX EDA (last descriptor address) */
4286 write_reg16(info, TXDMA + EDA,
4287 info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
4289 /* enable underrun IRQ */
4290 info->ie1_value &= ~IDLE;
4291 info->ie1_value |= UDRN;
4292 write_reg(info, IE1, info->ie1_value);
4293 write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
4295 write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
4296 write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
4298 mod_timer(&info->tx_timer, jiffies +
4299 msecs_to_jiffies(5000));
4303 /* async, enable IRQ on txdata */
4304 info->ie0_value |= TXRDYE;
4305 write_reg(info, IE0, info->ie0_value);
4308 info->tx_active = true;
4312 /* stop the transmitter and DMA
4314 static void tx_stop( SLMP_INFO *info )
4316 if (debug_level >= DEBUG_LEVEL_ISR)
4317 printk("%s(%d):%s tx_stop()\n",
4318 __FILE__,__LINE__, info->device_name );
4320 del_timer(&info->tx_timer);
4322 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4323 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4325 write_reg(info, CMD, TXRESET);
4327 info->ie1_value &= ~(UDRN + IDLE);
4328 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
4329 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
4331 info->ie0_value &= ~TXRDYE;
4332 write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
4334 info->tx_enabled = false;
4335 info->tx_active = false;
4338 /* Fill the transmit FIFO until the FIFO is full or
4339 * there is no more data to load.
4341 static void tx_load_fifo(SLMP_INFO *info)
4345 /* do nothing is now tx data available and no XON/XOFF pending */
4347 if ( !info->tx_count && !info->x_char )
4350 /* load the Transmit FIFO until FIFOs full or all data sent */
4352 while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
4354 /* there is more space in the transmit FIFO and */
4355 /* there is more data in transmit buffer */
4357 if ( (info->tx_count > 1) && !info->x_char ) {
4359 TwoBytes[0] = info->tx_buf[info->tx_get++];
4360 if (info->tx_get >= info->max_frame_size)
4361 info->tx_get -= info->max_frame_size;
4362 TwoBytes[1] = info->tx_buf[info->tx_get++];
4363 if (info->tx_get >= info->max_frame_size)
4364 info->tx_get -= info->max_frame_size;
4366 write_reg16(info, TRB, *((u16 *)TwoBytes));
4368 info->tx_count -= 2;
4369 info->icount.tx += 2;
4371 /* only 1 byte left to transmit or 1 FIFO slot left */
4374 /* transmit pending high priority char */
4375 write_reg(info, TRB, info->x_char);
4378 write_reg(info, TRB, info->tx_buf[info->tx_get++]);
4379 if (info->tx_get >= info->max_frame_size)
4380 info->tx_get -= info->max_frame_size;
4388 /* Reset a port to a known state
4390 static void reset_port(SLMP_INFO *info)
4392 if (info->sca_base) {
4397 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
4400 /* disable all port interrupts */
4401 info->ie0_value = 0;
4402 info->ie1_value = 0;
4403 info->ie2_value = 0;
4404 write_reg(info, IE0, info->ie0_value);
4405 write_reg(info, IE1, info->ie1_value);
4406 write_reg(info, IE2, info->ie2_value);
4408 write_reg(info, CMD, CHRESET);
4412 /* Reset all the ports to a known state.
4414 static void reset_adapter(SLMP_INFO *info)
4418 for ( i=0; i < SCA_MAX_PORTS; ++i) {
4419 if (info->port_array[i])
4420 reset_port(info->port_array[i]);
4424 /* Program port for asynchronous communications.
4426 static void async_mode(SLMP_INFO *info)
4429 unsigned char RegValue;
4434 /* MD0, Mode Register 0
4436 * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
4437 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4438 * 03 Reserved, must be 0
4439 * 02 CRCCC, CRC Calculation, 0=disabled
4440 * 01..00 STOP<1..0> Stop bits (00=1,10=2)
4445 if (info->params.stop_bits != 1)
4447 write_reg(info, MD0, RegValue);
4449 /* MD1, Mode Register 1
4451 * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
4452 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
4453 * 03..02 RXCHR<1..0>, rx char size
4454 * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
4459 switch (info->params.data_bits) {
4460 case 7: RegValue |= BIT4 + BIT2; break;
4461 case 6: RegValue |= BIT5 + BIT3; break;
4462 case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
4464 if (info->params.parity != ASYNC_PARITY_NONE) {
4466 if (info->params.parity == ASYNC_PARITY_ODD)
4469 write_reg(info, MD1, RegValue);
4471 /* MD2, Mode Register 2
4473 * 07..02 Reserved, must be 0
4474 * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
4479 if (info->params.loopback)
4480 RegValue |= (BIT1 + BIT0);
4481 write_reg(info, MD2, RegValue);
4483 /* RXS, Receive clock source
4485 * 07 Reserved, must be 0
4486 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4487 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4490 write_reg(info, RXS, RegValue);
4492 /* TXS, Transmit clock source
4494 * 07 Reserved, must be 0
4495 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4496 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4499 write_reg(info, TXS, RegValue);
4503 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4505 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4506 write_control_reg(info);
4510 /* RRC Receive Ready Control 0
4512 * 07..05 Reserved, must be 0
4513 * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
4515 write_reg(info, RRC, 0x00);
4517 /* TRC0 Transmit Ready Control 0
4519 * 07..05 Reserved, must be 0
4520 * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
4522 write_reg(info, TRC0, 0x10);
4524 /* TRC1 Transmit Ready Control 1
4526 * 07..05 Reserved, must be 0
4527 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
4529 write_reg(info, TRC1, 0x1e);
4531 /* CTL, MSCI control register
4533 * 07..06 Reserved, set to 0
4534 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4535 * 04 IDLC, idle control, 0=mark 1=idle register
4536 * 03 BRK, break, 0=off 1 =on (async)
4537 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4538 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4539 * 00 RTS, RTS output control, 0=active 1=inactive
4544 if (!(info->serial_signals & SerialSignal_RTS))
4546 write_reg(info, CTL, RegValue);
4548 /* enable status interrupts */
4549 info->ie0_value |= TXINTE + RXINTE;
4550 write_reg(info, IE0, info->ie0_value);
4552 /* enable break detect interrupt */
4553 info->ie1_value = BRKD;
4554 write_reg(info, IE1, info->ie1_value);
4556 /* enable rx overrun interrupt */
4557 info->ie2_value = OVRN;
4558 write_reg(info, IE2, info->ie2_value);
4560 set_rate( info, info->params.data_rate * 16 );
4563 /* Program the SCA for HDLC communications.
4565 static void hdlc_mode(SLMP_INFO *info)
4567 unsigned char RegValue;
4570 // Can't use DPLL because SCA outputs recovered clock on RxC when
4571 // DPLL mode selected. This causes output contention with RxC receiver.
4572 // Use of DPLL would require external hardware to disable RxC receiver
4573 // when DPLL mode selected.
4574 info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
4576 /* disable DMA interrupts */
4577 write_reg(info, TXDMA + DIR, 0);
4578 write_reg(info, RXDMA + DIR, 0);
4580 /* MD0, Mode Register 0
4582 * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
4583 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4584 * 03 Reserved, must be 0
4585 * 02 CRCCC, CRC Calculation, 1=enabled
4586 * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
4587 * 00 CRC0, CRC initial value, 1 = all 1s
4592 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
4594 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
4596 if (info->params.crc_type == HDLC_CRC_16_CCITT)
4597 RegValue |= BIT2 + BIT1;
4598 write_reg(info, MD0, RegValue);
4600 /* MD1, Mode Register 1
4602 * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
4603 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
4604 * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
4605 * 01..00 PMPM<1..0>, Parity mode, 00=no parity
4610 write_reg(info, MD1, RegValue);
4612 /* MD2, Mode Register 2
4614 * 07 NRZFM, 0=NRZ, 1=FM
4615 * 06..05 CODE<1..0> Encoding, 00=NRZ
4616 * 04..03 DRATE<1..0> DPLL Divisor, 00=8
4617 * 02 Reserved, must be 0
4618 * 01..00 CNCT<1..0> Channel connection, 0=normal
4623 switch(info->params.encoding) {
4624 case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
4625 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
4626 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
4627 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
4629 case HDLC_ENCODING_NRZB: /* not supported */
4630 case HDLC_ENCODING_NRZI_MARK: /* not supported */
4631 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
4634 if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
4637 } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
4643 write_reg(info, MD2, RegValue);
4646 /* RXS, Receive clock source
4648 * 07 Reserved, must be 0
4649 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4650 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4653 if (info->params.flags & HDLC_FLAG_RXC_BRG)
4655 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4656 RegValue |= BIT6 + BIT5;
4657 write_reg(info, RXS, RegValue);
4659 /* TXS, Transmit clock source
4661 * 07 Reserved, must be 0
4662 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4663 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4666 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4668 if (info->params.flags & HDLC_FLAG_TXC_DPLL)
4669 RegValue |= BIT6 + BIT5;
4670 write_reg(info, TXS, RegValue);
4672 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4673 set_rate(info, info->params.clock_speed * DpllDivisor);
4675 set_rate(info, info->params.clock_speed);
4677 /* GPDATA (General Purpose I/O Data Register)
4679 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4681 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4682 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4684 info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
4685 write_control_reg(info);
4687 /* RRC Receive Ready Control 0
4689 * 07..05 Reserved, must be 0
4690 * 04..00 RRC<4..0> Rx FIFO trigger active
4692 write_reg(info, RRC, rx_active_fifo_level);
4694 /* TRC0 Transmit Ready Control 0
4696 * 07..05 Reserved, must be 0
4697 * 04..00 TRC<4..0> Tx FIFO trigger active
4699 write_reg(info, TRC0, tx_active_fifo_level);
4701 /* TRC1 Transmit Ready Control 1
4703 * 07..05 Reserved, must be 0
4704 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
4706 write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
4708 /* DMR, DMA Mode Register
4710 * 07..05 Reserved, must be 0
4711 * 04 TMOD, Transfer Mode: 1=chained-block
4712 * 03 Reserved, must be 0
4713 * 02 NF, Number of Frames: 1=multi-frame
4714 * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
4715 * 00 Reserved, must be 0
4719 write_reg(info, TXDMA + DMR, 0x14);
4720 write_reg(info, RXDMA + DMR, 0x14);
4722 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4723 write_reg(info, RXDMA + CPB,
4724 (unsigned char)(info->buffer_list_phys >> 16));
4726 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4727 write_reg(info, TXDMA + CPB,
4728 (unsigned char)(info->buffer_list_phys >> 16));
4730 /* enable status interrupts. other code enables/disables
4731 * the individual sources for these two interrupt classes.
4733 info->ie0_value |= TXINTE + RXINTE;
4734 write_reg(info, IE0, info->ie0_value);
4736 /* CTL, MSCI control register
4738 * 07..06 Reserved, set to 0
4739 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4740 * 04 IDLC, idle control, 0=mark 1=idle register
4741 * 03 BRK, break, 0=off 1 =on (async)
4742 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4743 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4744 * 00 RTS, RTS output control, 0=active 1=inactive
4749 if (!(info->serial_signals & SerialSignal_RTS))
4751 write_reg(info, CTL, RegValue);
4753 /* preamble not supported ! */
4759 set_rate(info, info->params.clock_speed);
4761 if (info->params.loopback)
4762 enable_loopback(info,1);
4765 /* Set the transmit HDLC idle mode
4767 static void tx_set_idle(SLMP_INFO *info)
4769 unsigned char RegValue = 0xff;
4771 /* Map API idle mode to SCA register bits */
4772 switch(info->idle_mode) {
4773 case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
4774 case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
4775 case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
4776 case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
4777 case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
4778 case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
4779 case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
4782 write_reg(info, IDL, RegValue);
4785 /* Query the adapter for the state of the V24 status (input) signals.
4787 static void get_signals(SLMP_INFO *info)
4789 u16 status = read_reg(info, SR3);
4790 u16 gpstatus = read_status_reg(info);
4793 /* clear all serial signals except DTR and RTS */
4794 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
4796 /* set serial signal bits to reflect MISR */
4798 if (!(status & BIT3))
4799 info->serial_signals |= SerialSignal_CTS;
4801 if ( !(status & BIT2))
4802 info->serial_signals |= SerialSignal_DCD;
4804 testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
4805 if (!(gpstatus & testbit))
4806 info->serial_signals |= SerialSignal_RI;
4808 testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
4809 if (!(gpstatus & testbit))
4810 info->serial_signals |= SerialSignal_DSR;
4813 /* Set the state of DTR and RTS based on contents of
4814 * serial_signals member of device context.
4816 static void set_signals(SLMP_INFO *info)
4818 unsigned char RegValue;
4821 RegValue = read_reg(info, CTL);
4822 if (info->serial_signals & SerialSignal_RTS)
4826 write_reg(info, CTL, RegValue);
4828 // Port 0..3 DTR is ctrl reg <1,3,5,7>
4829 EnableBit = BIT1 << (info->port_num*2);
4830 if (info->serial_signals & SerialSignal_DTR)
4831 info->port_array[0]->ctrlreg_value &= ~EnableBit;
4833 info->port_array[0]->ctrlreg_value |= EnableBit;
4834 write_control_reg(info);
4837 /*******************/
4838 /* DMA Buffer Code */
4839 /*******************/
4841 /* Set the count for all receive buffers to SCABUFSIZE
4842 * and set the current buffer to the first buffer. This effectively
4843 * makes all buffers free and discards any data in buffers.
4845 static void rx_reset_buffers(SLMP_INFO *info)
4847 rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
4850 /* Free the buffers used by a received frame
4852 * info pointer to device instance data
4853 * first index of 1st receive buffer of frame
4854 * last index of last receive buffer of frame
4856 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
4861 /* reset current buffer for reuse */
4862 info->rx_buf_list[first].status = 0xff;
4864 if (first == last) {
4866 /* set new last rx descriptor address */
4867 write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
4871 if (first == info->rx_buf_count)
4875 /* set current buffer to next buffer after last buffer of frame */
4876 info->current_rx_buf = first;
4879 /* Return a received frame from the receive DMA buffers.
4880 * Only frames received without errors are returned.
4882 * Return Value: true if frame returned, otherwise false
4884 static bool rx_get_frame(SLMP_INFO *info)
4886 unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
4887 unsigned short status;
4888 unsigned int framesize = 0;
4889 bool ReturnCode = false;
4890 unsigned long flags;
4891 struct tty_struct *tty = info->port.tty;
4892 unsigned char addr_field = 0xff;
4894 SCADESC_EX *desc_ex;
4897 /* assume no frame returned, set zero length */
4902 * current_rx_buf points to the 1st buffer of the next available
4903 * receive frame. To find the last buffer of the frame look for
4904 * a non-zero status field in the buffer entries. (The status
4905 * field is set by the 16C32 after completing a receive frame.
4907 StartIndex = EndIndex = info->current_rx_buf;
4910 desc = &info->rx_buf_list[EndIndex];
4911 desc_ex = &info->rx_buf_list_ex[EndIndex];
4913 if (desc->status == 0xff)
4914 goto Cleanup; /* current desc still in use, no frames available */
4916 if (framesize == 0 && info->params.addr_filter != 0xff)
4917 addr_field = desc_ex->virt_addr[0];
4919 framesize += desc->length;
4921 /* Status != 0 means last buffer of frame */
4926 if (EndIndex == info->rx_buf_count)
4929 if (EndIndex == info->current_rx_buf) {
4930 /* all buffers have been 'used' but none mark */
4931 /* the end of a frame. Reset buffers and receiver. */
4932 if ( info->rx_enabled ){
4933 spin_lock_irqsave(&info->lock,flags);
4935 spin_unlock_irqrestore(&info->lock,flags);
4942 /* check status of receive frame */
4944 /* frame status is byte stored after frame data
4946 * 7 EOM (end of msg), 1 = last buffer of frame
4947 * 6 Short Frame, 1 = short frame
4948 * 5 Abort, 1 = frame aborted
4949 * 4 Residue, 1 = last byte is partial
4950 * 3 Overrun, 1 = overrun occurred during frame reception
4951 * 2 CRC, 1 = CRC error detected
4954 status = desc->status;
4956 /* ignore CRC bit if not using CRC (bit is undefined) */
4957 /* Note:CRC is not save to data buffer */
4958 if (info->params.crc_type == HDLC_CRC_NONE)
4961 if (framesize == 0 ||
4962 (addr_field != 0xff && addr_field != info->params.addr_filter)) {
4963 /* discard 0 byte frames, this seems to occur sometime
4964 * when remote is idling flags.
4966 rx_free_frame_buffers(info, StartIndex, EndIndex);
4973 if (status & (BIT6+BIT5+BIT3+BIT2)) {
4974 /* received frame has errors,
4975 * update counts and mark frame size as 0
4978 info->icount.rxshort++;
4979 else if (status & BIT5)
4980 info->icount.rxabort++;
4981 else if (status & BIT3)
4982 info->icount.rxover++;
4984 info->icount.rxcrc++;
4987 #if SYNCLINK_GENERIC_HDLC
4989 info->netdev->stats.rx_errors++;
4990 info->netdev->stats.rx_frame_errors++;
4995 if ( debug_level >= DEBUG_LEVEL_BH )
4996 printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
4997 __FILE__,__LINE__,info->device_name,status,framesize);
4999 if ( debug_level >= DEBUG_LEVEL_DATA )
5000 trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
5001 min_t(int, framesize,SCABUFSIZE),0);
5004 if (framesize > info->max_frame_size)
5005 info->icount.rxlong++;
5007 /* copy dma buffer(s) to contiguous intermediate buffer */
5008 int copy_count = framesize;
5009 int index = StartIndex;
5010 unsigned char *ptmp = info->tmp_rx_buf;
5011 info->tmp_rx_buf_count = framesize;
5013 info->icount.rxok++;
5016 int partial_count = min(copy_count,SCABUFSIZE);
5018 info->rx_buf_list_ex[index].virt_addr,
5020 ptmp += partial_count;
5021 copy_count -= partial_count;
5023 if ( ++index == info->rx_buf_count )
5027 #if SYNCLINK_GENERIC_HDLC
5029 hdlcdev_rx(info,info->tmp_rx_buf,framesize);
5032 ldisc_receive_buf(tty,info->tmp_rx_buf,
5033 info->flag_buf, framesize);
5036 /* Free the buffers used by this frame. */
5037 rx_free_frame_buffers( info, StartIndex, EndIndex );
5042 if ( info->rx_enabled && info->rx_overflow ) {
5043 /* Receiver is enabled, but needs to restarted due to
5044 * rx buffer overflow. If buffers are empty, restart receiver.
5046 if (info->rx_buf_list[EndIndex].status == 0xff) {
5047 spin_lock_irqsave(&info->lock,flags);
5049 spin_unlock_irqrestore(&info->lock,flags);
5056 /* load the transmit DMA buffer with data
5058 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
5060 unsigned short copy_count;
5063 SCADESC_EX *desc_ex;
5065 if ( debug_level >= DEBUG_LEVEL_DATA )
5066 trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1);
5068 /* Copy source buffer to one or more DMA buffers, starting with
5069 * the first transmit dma buffer.
5073 copy_count = min_t(unsigned short,count,SCABUFSIZE);
5075 desc = &info->tx_buf_list[i];
5076 desc_ex = &info->tx_buf_list_ex[i];
5078 load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
5080 desc->length = copy_count;
5084 count -= copy_count;
5090 if (i >= info->tx_buf_count)
5094 info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
5095 info->last_tx_buf = ++i;
5098 static bool register_test(SLMP_INFO *info)
5100 static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
5101 static unsigned int count = ARRAY_SIZE(testval);
5104 unsigned long flags;
5106 spin_lock_irqsave(&info->lock,flags);
5109 /* assume failure */
5110 info->init_error = DiagStatus_AddressFailure;
5112 /* Write bit patterns to various registers but do it out of */
5113 /* sync, then read back and verify values. */
5115 for (i = 0 ; i < count ; i++) {
5116 write_reg(info, TMC, testval[i]);
5117 write_reg(info, IDL, testval[(i+1)%count]);
5118 write_reg(info, SA0, testval[(i+2)%count]);
5119 write_reg(info, SA1, testval[(i+3)%count]);
5121 if ( (read_reg(info, TMC) != testval[i]) ||
5122 (read_reg(info, IDL) != testval[(i+1)%count]) ||
5123 (read_reg(info, SA0) != testval[(i+2)%count]) ||
5124 (read_reg(info, SA1) != testval[(i+3)%count]) )
5132 spin_unlock_irqrestore(&info->lock,flags);
5137 static bool irq_test(SLMP_INFO *info)
5139 unsigned long timeout;
5140 unsigned long flags;
5142 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
5144 spin_lock_irqsave(&info->lock,flags);
5147 /* assume failure */
5148 info->init_error = DiagStatus_IrqFailure;
5149 info->irq_occurred = false;
5151 /* setup timer0 on SCA0 to interrupt */
5153 /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
5154 write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
5156 write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
5157 write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
5160 /* TMCS, Timer Control/Status Register
5162 * 07 CMF, Compare match flag (read only) 1=match
5163 * 06 ECMI, CMF Interrupt Enable: 1=enabled
5164 * 05 Reserved, must be 0
5165 * 04 TME, Timer Enable
5166 * 03..00 Reserved, must be 0
5170 write_reg(info, (unsigned char)(timer + TMCS), 0x50);
5172 spin_unlock_irqrestore(&info->lock,flags);
5175 while( timeout-- && !info->irq_occurred ) {
5176 msleep_interruptible(10);
5179 spin_lock_irqsave(&info->lock,flags);
5181 spin_unlock_irqrestore(&info->lock,flags);
5183 return info->irq_occurred;
5186 /* initialize individual SCA device (2 ports)
5188 static bool sca_init(SLMP_INFO *info)
5190 /* set wait controller to single mem partition (low), no wait states */
5191 write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
5192 write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
5193 write_reg(info, WCRL, 0); /* wait controller low range */
5194 write_reg(info, WCRM, 0); /* wait controller mid range */
5195 write_reg(info, WCRH, 0); /* wait controller high range */
5197 /* DPCR, DMA Priority Control
5199 * 07..05 Not used, must be 0
5200 * 04 BRC, bus release condition: 0=all transfers complete
5201 * 03 CCC, channel change condition: 0=every cycle
5202 * 02..00 PR<2..0>, priority 100=round robin
5206 write_reg(info, DPCR, dma_priority);
5208 /* DMA Master Enable, BIT7: 1=enable all channels */
5209 write_reg(info, DMER, 0x80);
5211 /* enable all interrupt classes */
5212 write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
5213 write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
5214 write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
5216 /* ITCR, interrupt control register
5217 * 07 IPC, interrupt priority, 0=MSCI->DMA
5218 * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
5219 * 04 VOS, Vector Output, 0=unmodified vector
5220 * 03..00 Reserved, must be 0
5222 write_reg(info, ITCR, 0);
5227 /* initialize adapter hardware
5229 static bool init_adapter(SLMP_INFO *info)
5233 /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
5234 volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
5237 info->misc_ctrl_value |= BIT30;
5238 *MiscCtrl = info->misc_ctrl_value;
5241 * Force at least 170ns delay before clearing
5242 * reset bit. Each read from LCR takes at least
5243 * 30ns so 10 times for 300ns to be safe.
5246 readval = *MiscCtrl;
5248 info->misc_ctrl_value &= ~BIT30;
5249 *MiscCtrl = info->misc_ctrl_value;
5251 /* init control reg (all DTRs off, all clksel=input) */
5252 info->ctrlreg_value = 0xaa;
5253 write_control_reg(info);
5256 volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
5257 lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
5259 switch(read_ahead_count)
5262 lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
5265 lcr1_brdr_value |= BIT5 + BIT4;
5268 lcr1_brdr_value |= BIT5 + BIT3;
5271 lcr1_brdr_value |= BIT5;
5275 *LCR1BRDR = lcr1_brdr_value;
5276 *MiscCtrl = misc_ctrl_value;
5279 sca_init(info->port_array[0]);
5280 sca_init(info->port_array[2]);
5285 /* Loopback an HDLC frame to test the hardware
5286 * interrupt and DMA functions.
5288 static bool loopback_test(SLMP_INFO *info)
5290 #define TESTFRAMESIZE 20
5292 unsigned long timeout;
5293 u16 count = TESTFRAMESIZE;
5294 unsigned char buf[TESTFRAMESIZE];
5296 unsigned long flags;
5298 struct tty_struct *oldtty = info->port.tty;
5299 u32 speed = info->params.clock_speed;
5301 info->params.clock_speed = 3686400;
5302 info->port.tty = NULL;
5304 /* assume failure */
5305 info->init_error = DiagStatus_DmaFailure;
5307 /* build and send transmit frame */
5308 for (count = 0; count < TESTFRAMESIZE;++count)
5309 buf[count] = (unsigned char)count;
5311 memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
5313 /* program hardware for HDLC and enabled receiver */
5314 spin_lock_irqsave(&info->lock,flags);
5316 enable_loopback(info,1);
5318 info->tx_count = count;
5319 tx_load_dma_buffer(info,buf,count);
5321 spin_unlock_irqrestore(&info->lock,flags);
5323 /* wait for receive complete */
5324 /* Set a timeout for waiting for interrupt. */
5325 for ( timeout = 100; timeout; --timeout ) {
5326 msleep_interruptible(10);
5328 if (rx_get_frame(info)) {
5334 /* verify received frame length and contents */
5336 ( info->tmp_rx_buf_count != count ||
5337 memcmp(buf, info->tmp_rx_buf,count))) {
5341 spin_lock_irqsave(&info->lock,flags);
5342 reset_adapter(info);
5343 spin_unlock_irqrestore(&info->lock,flags);
5345 info->params.clock_speed = speed;
5346 info->port.tty = oldtty;
5351 /* Perform diagnostics on hardware
5353 static int adapter_test( SLMP_INFO *info )
5355 unsigned long flags;
5356 if ( debug_level >= DEBUG_LEVEL_INFO )
5357 printk( "%s(%d):Testing device %s\n",
5358 __FILE__,__LINE__,info->device_name );
5360 spin_lock_irqsave(&info->lock,flags);
5362 spin_unlock_irqrestore(&info->lock,flags);
5364 info->port_array[0]->port_count = 0;
5366 if ( register_test(info->port_array[0]) &&
5367 register_test(info->port_array[1])) {
5369 info->port_array[0]->port_count = 2;
5371 if ( register_test(info->port_array[2]) &&
5372 register_test(info->port_array[3]) )
5373 info->port_array[0]->port_count += 2;
5376 printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
5377 __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
5381 if ( !irq_test(info->port_array[0]) ||
5382 !irq_test(info->port_array[1]) ||
5383 (info->port_count == 4 && !irq_test(info->port_array[2])) ||
5384 (info->port_count == 4 && !irq_test(info->port_array[3]))) {
5385 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
5386 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
5390 if (!loopback_test(info->port_array[0]) ||
5391 !loopback_test(info->port_array[1]) ||
5392 (info->port_count == 4 && !loopback_test(info->port_array[2])) ||
5393 (info->port_count == 4 && !loopback_test(info->port_array[3]))) {
5394 printk( "%s(%d):DMA test failure for device %s\n",
5395 __FILE__,__LINE__,info->device_name);
5399 if ( debug_level >= DEBUG_LEVEL_INFO )
5400 printk( "%s(%d):device %s passed diagnostics\n",
5401 __FILE__,__LINE__,info->device_name );
5403 info->port_array[0]->init_error = 0;
5404 info->port_array[1]->init_error = 0;
5405 if ( info->port_count > 2 ) {
5406 info->port_array[2]->init_error = 0;
5407 info->port_array[3]->init_error = 0;
5413 /* Test the shared memory on a PCI adapter.
5415 static bool memory_test(SLMP_INFO *info)
5417 static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
5418 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
5419 unsigned long count = ARRAY_SIZE(testval);
5421 unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
5422 unsigned long * addr = (unsigned long *)info->memory_base;
5424 /* Test data lines with test pattern at one location. */
5426 for ( i = 0 ; i < count ; i++ ) {
5428 if ( *addr != testval[i] )
5432 /* Test address lines with incrementing pattern over */
5433 /* entire address range. */
5435 for ( i = 0 ; i < limit ; i++ ) {
5440 addr = (unsigned long *)info->memory_base;
5442 for ( i = 0 ; i < limit ; i++ ) {
5443 if ( *addr != i * 4 )
5448 memset( info->memory_base, 0, SCA_MEM_SIZE );
5452 /* Load data into PCI adapter shared memory.
5454 * The PCI9050 releases control of the local bus
5455 * after completing the current read or write operation.
5457 * While the PCI9050 write FIFO not empty, the
5458 * PCI9050 treats all of the writes as a single transaction
5459 * and does not release the bus. This causes DMA latency problems
5460 * at high speeds when copying large data blocks to the shared memory.
5462 * This function breaks a write into multiple transations by
5463 * interleaving a read which flushes the write FIFO and 'completes'
5464 * the write transation. This allows any pending DMA request to gain control
5465 * of the local bus in a timely fasion.
5467 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
5469 /* A load interval of 16 allows for 4 32-bit writes at */
5470 /* 136ns each for a maximum latency of 542ns on the local bus.*/
5472 unsigned short interval = count / sca_pci_load_interval;
5475 for ( i = 0 ; i < interval ; i++ )
5477 memcpy(dest, src, sca_pci_load_interval);
5478 read_status_reg(info);
5479 dest += sca_pci_load_interval;
5480 src += sca_pci_load_interval;
5483 memcpy(dest, src, count % sca_pci_load_interval);
5486 static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
5491 printk("%s tx data:\n",info->device_name);
5493 printk("%s rx data:\n",info->device_name);
5501 for(i=0;i<linecount;i++)
5502 printk("%02X ",(unsigned char)data[i]);
5505 for(i=0;i<linecount;i++) {
5506 if (data[i]>=040 && data[i]<=0176)
5507 printk("%c",data[i]);
5516 } /* end of trace_block() */
5518 /* called when HDLC frame times out
5519 * update stats and do tx completion processing
5521 static void tx_timeout(unsigned long context)
5523 SLMP_INFO *info = (SLMP_INFO*)context;
5524 unsigned long flags;
5526 if ( debug_level >= DEBUG_LEVEL_INFO )
5527 printk( "%s(%d):%s tx_timeout()\n",
5528 __FILE__,__LINE__,info->device_name);
5529 if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
5530 info->icount.txtimeout++;
5532 spin_lock_irqsave(&info->lock,flags);
5533 info->tx_active = false;
5534 info->tx_count = info->tx_put = info->tx_get = 0;
5536 spin_unlock_irqrestore(&info->lock,flags);
5538 #if SYNCLINK_GENERIC_HDLC
5540 hdlcdev_tx_done(info);
5546 /* called to periodically check the DSR/RI modem signal input status
5548 static void status_timeout(unsigned long context)
5551 SLMP_INFO *info = (SLMP_INFO*)context;
5552 unsigned long flags;
5553 unsigned char delta;
5556 spin_lock_irqsave(&info->lock,flags);
5558 spin_unlock_irqrestore(&info->lock,flags);
5560 /* check for DSR/RI state change */
5562 delta = info->old_signals ^ info->serial_signals;
5563 info->old_signals = info->serial_signals;
5565 if (delta & SerialSignal_DSR)
5566 status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
5568 if (delta & SerialSignal_RI)
5569 status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
5571 if (delta & SerialSignal_DCD)
5572 status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
5574 if (delta & SerialSignal_CTS)
5575 status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
5578 isr_io_pin(info,status);
5580 mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
5584 /* Register Access Routines -
5585 * All registers are memory mapped
5587 #define CALC_REGADDR() \
5588 unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
5589 if (info->port_num > 1) \
5590 RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
5591 if ( info->port_num & 1) { \
5593 RegAddr += 0x40; /* DMA access */ \
5594 else if (Addr > 0x1f && Addr < 0x60) \
5595 RegAddr += 0x20; /* MSCI access */ \
5599 static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
5604 static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
5610 static u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
5613 return *((u16 *)RegAddr);
5616 static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
5619 *((u16 *)RegAddr) = Value;
5622 static unsigned char read_status_reg(SLMP_INFO * info)
5624 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5628 static void write_control_reg(SLMP_INFO * info)
5630 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5631 *RegAddr = info->port_array[0]->ctrlreg_value;
5635 static int __devinit synclinkmp_init_one (struct pci_dev *dev,
5636 const struct pci_device_id *ent)
5638 if (pci_enable_device(dev)) {
5639 printk("error enabling pci device %p\n", dev);
5642 device_init( ++synclinkmp_adapter_count, dev );
5646 static void __devexit synclinkmp_remove_one (struct pci_dev *dev)